San Francisco - Twitter, which is preparing for its initial public offering, said on Wednesday it will help users receive special alerts from government agencies and aid agencies during emergencies.
Users who sign up will receive smartphone notifications via the Twitter app as well as SMS text messages - assuming they agree to handover their cell phone numbers - from any of several dozen agencies who have signed on to the program.
The US Federal Emergency Management Agency, Tokyo's Disaster Prevention service and the World Health Organization are among those participating.
The alerts program starts a year after Twitter showcased its potential as a lifeline during Hurricane Sandy, when stranded residents on the eastern US seaboard reported the storm's progress and sought help on the mobile network.
A similar lifeline service played a part in the rescue efforts in Japan following the devastating 2011 tsunami, Twitter said. The program is initially available in the United States, Japan and Korea and will be expanded to other countries.
Craig Fugate, the FEMA administrator, said the service was at the cutting edge of disaster management in the age of smartphones.
"Today we have a two-way street — residents are informed about hazards in real time and emergency managers receive immediate feedback on the consequences of a disaster," Fugate said in a statement.
The program reflects the evolution of Twitter from its earliest days, when it gained a reputation as a hangout for geeks to share the minute details of their most recent meal or who they encountered at the South by Southwest Festival.
But the crowd-sourced information of today's Twitter has also proved problematic.
Even as the New York City Fire Department used Twitter to communicate with residents during Hurricane Sandy, there were pranksters who spread misinformation on the service, including a rumor that the New York Stock Exchange was submerged underwater.
And in the wake of the Boston Marathon bombing, the name of a missing Brown University student went viral on Twitter after many users, including journalists, mistakenly identified him as a suspect.
Twitter, for its part, has maintained a strictly hands-off attitude toward monitoring its content and denied responsibility for ensuring its accuracy.
Earlier this month, Twitter filed with regulators for an initial public offering. Reuters reported last week that Twitter was in talks looking to add additional banks to its underwriting syndicate.
NEW DELHI: India’s Prime Minister Manmohan Singh branded Thursday's attack by militants on an Indian police station and army camp in disputed Kashmir as “barbaric” but - without mentioning Pakistan - said it would not derail efforts to pursue peace through dialogue.
“This is one more in a series of provocations and barbaric actions by the enemies of peace,” Manmohan Singh said in a statement. “Such attacks will not deter us and will not succeed in derailing our efforts to find a resolution to all problems through a process of dialogue.”
A group of militants dressed in Indian army uniforms attacked an Indian police station located near the main city of Srinagar before attacking an army camp and killing eight people, Indian officials said.
The attack triggered calls in New Delhi for talks between the rival nations' leaders at the weekend to be called.
Just a day before the attack, Singh said he would meet Pakistani Prime Minister Nawaz Sharif on the sidelines of the United Nations (UN) General Assembly for highly anticipated talks.
The Pakistani Prime Minister had also earlier expressed his wish to meet his Indian counterpart at the UN General Assembly to resume peace efforts between the two South Asian countries.
The talks are expected to discuss rising violence in the Kashmir region and to promote cordial relations between the neighbouring countries.
While Pakistani officials have not yet outlined the agenda for the Sharif-Singh meeting, Indian officials have said the issue of terrorism would figure prominently in the talks.
Pakistani officials, however, underlined Mr Sharif’s commitment to improving ties with India, pointing out that despite a downturn in ties after clashes at the Line of Control (LoC), the prime minister had been pushing for a meeting with Singh in New York.
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| Attacks of this nature, locally known as “insider” or “green on blue” are common in Afghanistan where Afghan troops turn on Nato and US allies.—AFP/File Photo |
KABUL: An Afghan soldier opened fire Thursday on his Nato trainers, killing one and wounding several others in the country’s east, officials said.
Attacks in which Afghan forces turn their guns on their international partners have killed scores of US-led troops, breeding mistrust and undermining efforts to train local forces before Nato combat troops withdraw next year.
The latest shooting was at a military training facility and base in the eastern province of Paktia, known to be one of the hotbeds of the Taliban insurgency, an Afghan official said.
The soldier attached to Nato’s International Security Assistance Force (ISAF) was inside the base when attacked, Rohullah Samoon, the local administration spokesman, told AFP from the provincial capital Gadez.
ISAF said the attacker, described as “wearing Afghan national security forces uniform”, was killed in return fire from other troops on the ground.
ISAF did not provide further details including the exact location of the incident or the nationality of the victim.
Attacks of this nature, locally known as “insider” or “green on blue” are common in Afghanistan where Afghan troops, some of them reportedly affiliated to insurgent groups, turn on Nato and US allies.
An Afghan soldier shot dead three US soldiers during a training exercise in Paktia last Saturday.
BAGHDAD: A bomb exploded in a crowded market in the Iraqi capital on Thursday, killing at least seven people and wounding 15, officials said.
The blast in the Dura area of south Baghdad marks the latest in a spate of attacks at markets, which are frequently targeted by militants seeking to cause maximum casualties.
Iraq is witnessing the worst violence since 2008, when the country was just emerging from a brutal sectarian conflict.
There are persistent fears that Iraq will return to the all-out Sunni-Shia sectarian violence that peaked in 2006-2007 and killed tens of thousands of people.
With the latest violence, more than 680 people have been killed this month and over 4,500 since the beginning of the year, according to AFP figures based on security and medical sources.
Diplomats and analysts say the Shia-led government's failure to address the grievances of the Sunni Arab minority, who complain of political exclusion and abuses at the hands of the security forces, has driven the spike in violence this year.
Sectarian tensions created by the civil war in neighbouring Syria have also fuelled the violence rocking Iraq.
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| Cristiano Ronaldo scored twice in the second half to give Real Madrid a hard-fought 2-1 away win at Elche in the Spanish league Wednesday. — File Photo by Reuters |
MADRID: Cristiano Ronaldo scored twice in the second half to give Real Madrid a hard-fought 2-1 away win at Elche in the Spanish league Wednesday.
In a lackluster, strategic match, Elche defender Eduardo Albacar struck a free kick that David Lomban back-headed toward goal, forcing an athletic save from goalkeeper Diego Lopez in the 10th minute.
Ronaldo scored from a direct free kick in the 50th minute which bounced just in front of goalkeeper Manuel Herrera, who got a touch but was unable to deflect the ball.
''It was a very difficult match in which our opponents played very well and caused us some problems, and there was that goal near the end that we shouldn't have conceded,'' said Lopez.
Ghanaian striker Richmond Boakye who is on loan to Elche from Juventus, headed a perfectly-aimed shot into goal from an Albacar cross in injury time.
Madrid was then awarded a much-argued penalty one minute later as defender Pepe wrestled with Elche midfielder Carlos Sanchez in the penalty area during a free kick.
Ronaldo stepped up to convert the shot, six minutes into injury time.
''We have to be realists, but they have scored two goals against us from two actions that from my point of view should not have gone against us,'' said Albacar. ''I end up with the sensation that they have robbed us. From having got a draw against a very good team, I go away feeling we've been mugged.''
Madrid coach Carlo Ancelotti said that as a general rule he did not like talking about referee's decisions. ''It's difficult to comment because my position from the bench is not so good, but I spoke to Pepe and he told me the penalty was clear.''
Madrid's recent star signing Gareth Bale was sidelined due to a left thigh injury sustained during training last week.
Elsewhere, two goals each by Ivan Rakitic and Carlos Bacca gave Sevilla a 4-1 win over nine-man Rayo Vallecano.
An injury time goal by Brazil midfielder Jonas gave Valencia a 1-0 win over Granada.
Barcelona leads the standings with Atletico Madrid second-place, also on 18 points after six matches, but on a worse goal differential.
Real Madrid is third on 16 with Valencia seventh on nine, while Granada is 14th on five, Elche is 18th on three and Rayo is bottom, also on three.
KARACHI: The body of a teenaged schoolgirl was found on Karachi’s Seaview beach on Thursday.
The autopsy report of the girl confirmed that she was “sodomised”, a medico-legal officer informed Dawn.com on condition of anonymity.
The MLO said the girl was “smothered after being sodomised”. She added that the girl died 36 to 48 hours before her body was recovered and sent for post-mortem today. Moreover, the report revealed that her skin had peeled off from one side of the face due to seawater abrasion. Apart from that, there were small bruises on her body.
According to the police, the girl aged between 13-14 years was killed before being dumped near the sea. Her body was discovered by bystanders who subsequently alerted authorities. She was wearing a school uniform.
The police had earlier suspected that the girl might have been raped before being murdered. However, Head of Emergency Ward at the Jinnah Postgraduate Medical Centre Dr Seemin Jamali did not confirm then since the autopsy was underway.
Preliminary details by the police suggested that the victim was a resident of the city’s Banghoria Goth in Azizabad. A day before, her family had filed a report regarding her kidnapping, police sources told Dawn.com.
SRINAGAR: Militants stormed a police station and an Indian army base in Kashmir on Thursday, killing at least nine in an attack the state's chief minister said was aimed at derailing peace talks between India and Pakistan.
“This attack in Jammu is aimed at derailing the dialogue process,” said Omar Abdullah, chief minister of the Indian administered Kashmir.
The group of militants who attacked a police station and army camp in India administered Kashmir on Thursday had crossed the border from Pakistan the previous day, the state's chief minister said.
Omar Abdullah told reporters that the raid appeared designed to upset plans for a meeting in New York this week between Indian Prime Minister Manmohan Singh and Pakistani Prime Minister Nawaz Sharif.
“Given the history, timing and location, the aim is to derail the proposed meeting between Prime Minister Manmohan Singh and his Pakistani counterpart,” Abdullah said. “There are forces that are inimical to peace and want to derail any peace process.”
The militants, all wearing army fatigues, lobbed grenades and opened fire at the Hiranagar police station near the border with Pakistan, police said.
Around the same time attackers struck at an army base in the nearby Samba district in the southern-most part of the the Indian-administered state where a fierce gunbattle with soldiers took place and Indian tanks were deployed.
The attacks are set to overshadow a meeting by Indian Prime Minister Manmohan Singh and his Pakistani counterpart Nawaz Sharif on the sidelines of the UN General Assembly this weekend, the first top-level dialogue in three years.
Manmohan Singh condemned “the heinous terrorist attack” in a statement but said that that it “will not deter us and will not succeed in derailing our efforts to find a resolution to all problems through a process of dialogue”.
Militant attacks have a history of stalling stop-start peace efforts between the two neighbours, who have fought three wars since independence, because New Delhi accuses Pakistan of abetting the groups which strike Indian targets.
The NDTV channel reported that Thursday's attackers may have driven from the police station to the army camp in a hijacked truck, but other security sources cautioned that there might have been separate groups.
“I was inside the dhaba (a roadside eatery) when I saw three men entering the camp firing a barrage of bullets. They opened the gates and entered,” one eyewitness told reporters outside the army camp in Samba.
Gunshots could be heard ringing out from inside the walled compound, while two officers could be seen running out carrying an injured man over their shoulder.
At least five policemen and two civilians were killed in the first attack on the police station in Kathua district, a police officer told AFP, and at least two soldiers including an officer died in the second assault, a separate army source who asked not to be named confirmed.
Indian premier Singh confirmed on Wednesday that he would meet his Pakistani counterpart Nawaz Sharif despite calls from the opposition to take a hardline with Islamabad.
Formal peace talks known as the Composite Dialogue are currently off and India has been keen to downplay any expectation they might restart as a result of Sunday's talks.
“Primarily we will see whether the dialogue process that started between the two countries, that stopped and got derailed, can that be brought back on track,” Foreign Minister Salman Khurshid told reporters at the UN on Wednesday.
Kashmir, a picturesque Himalayan territory, is divided between India and Pakistan by a de facto border known as the Line of Control (LoC) but it is claimed in full by both countries.
PESHAWAR: Pakistan Tehrik-i-Insaaf (PTI) chairman Imran Khan on Wednesday urged the government to declare a ceasefire if it was serious about holding peace talks with militants in Pakistan.
The PTI chief also called on the government to allow militants to open an office in Pakistan similar to the Afghan Taliban office in Qatar to facilitate the dialogue process, DawnNews reported.
Speaking to media representatives after visiting injured persons of the Peshawar church bombing at the Lady Reading Hospital, Khan said that on one hand, there were talks of holding negotiations whereas on the other, war was still ongoing. How would it be possible to hold peace talks, he questioned.
The PTI chairman moreover said that after the fourth All Parties Conference (APC), it was decided to hold peace talks; however no solutions had come about.
Khan stressed that the government should take negotiations seriously, adding that it should declare a ceasefire.
Furthermore, he also said that the government should allow militants to establish a political office in Pakistan to hold peace talks in the absence of which negotiations would not be possible and the decade-long war against terrorism would continue.
While discussing the Peshawar church bombing which killed 81 people, Khan alleged that the tragedy had been politicised. He said 170 blasts had taken place in Khyber Pakhtunkhwa in the past nine years under previous governments, but PTI had not politicised those tragedies.
ROME: Three boats carrying more than 700 asylum-seekers — some of whom were Syrian refugees — landed in Italy on Wednesday, the Coastguard said.
The new arrivals reflected a sharp increase in boats landing with people fleeing conflict-torn parts of the Mediterranean region and the Horn of Africa.
Two of the boats arrived on the island of Lampedusa, Italy's southernmost point and a major gateway for undocumented migration into the European Union.
The first boat had 398 Syrians on board, the second had 111 whose nationality was yet to be determined.
The latest arrivals have caused severe overcrowding in the temporary migrant centre on the tiny island, which can only house 350 people and was already too full.
A third boat, which was spotted by a patrol plane on Tuesday, arrived in the port of Syracuse in Sicily with around 200 people on board, including 70 children.
The UN refugee agency earlier this month said that at more than 20,000, the number of asylum-seekers arriving in Italy was already around triple the whole of 2012, with most coming from Eritrea, Somalia and Syria.
A 22-year-old Syrian woman was found dead on a boat that arrived on Saturday with 339 people on board. Her funeral was held in Sicily on Wednesday.
NAIROBI: Somalia's Shebab insurgents claimed Wednesday 137 hostages they had seized died in a Nairobi shopping mall siege, figures impossible to verify and higher than the number of people officially registered as missing.
The Al-Qaeda-linked fighters, in a message posted on Twitter, said “137 hostages who were being held by the mujaheddin” had died.
They also accused Kenyan troops of using “chemical agents” to end the four-day stand-off.
“In an act of sheer cowardice, beleaguered Kenyan forces deliberately fired projectiles containing chemical agents,” one tweet read.
“To cover their crime, the Kenyan government carried out a demolition to the building, burying evidence and all hostages under the rubble.” President Uhuru Kenyatta announced an end to the 80-hour bloodbath late Tuesday, with the “immense” loss of 61 civilians and six members of the security forces.
Police said the death toll was provisional, with the Kenyan Red Cross listing 63 people as still missing.
There was no immediate response from Kenya's government, but the Shebab have in past made repeated outlandish claims, especially on their Twitter site.
The Shebab said they carried out the attack in retaliation for Kenya's two-year battle against the extremists' bases in the country.
In one of the worst attacks in Kenya's history, the militants marched into the four-storey, part Israeli-owned mall at midday Saturday, spraying shoppers with automatic weapons fire and tossing grenades.
Kenya on Wednesday began three days of official mourning, with flags flying at half mast, while rescue workers scoured the wreckage of the mall for bodies.
Close to 200 were wounded in the four-day siege, which saw running battles between militants and security forces in the complex, Nairobi's largest shopping centre and popular with wealthy Kenyans, diplomats, UN workers and other expatriates.
ISLAMABAD: The Supreme Court on Wednesday declared the appointment of Director General Chief Air Marshall Authority (CAA) retired Khalid Chaudhry as null and void and issued a notification to cancel his appointment, DawnNews reported.
A three-member of the apex court, headed by Chief Justice Iftikhar Muhammad Chaudhry, was hearing the case pertaining to the delay in the construction of the New Benazir Bhutto International Airport in the country’s federal capital.
During the hearing, the court ruled that Chaudhry’s appointment did not fulfill legal requirements and subsequently issued a notification to cancel it.
The court moreover declared unsatisfactory the Civil Aviation report submitted in the court.
The bench said that action would be taken against those who had sanctioned the construction of the New Benazir Bhutto International Airport. It also directed the Federal Investigation Agency (FIA) team to complete investigation against irregularities in the construction of the airport at the earliest.
The court moreover stated that all contractors should assist the FIA team, adding that in event of non-cooperation, legal action would be taken.
The bench said that a detailed judgment on the matter would be issued later.
The Supreme Court had earlier taken up the case on a private petition that the delay in the construction of the airport had pushed the original cost of Rs35 billion to Rs73 billion, and might escalate further.
Petitioner Asaf Fasihuudin Vardag, a lawyer, wanted the Supreme Court to direct the authorities to appoint “an eligible officer as the project manager” in place of the incumbent CAA Director-General Air Marshal (retired) Khalid Chaudhry.
NEW DELHI: Indian premier Manmohan Singh confirmed Wednesday he will meet Prime Minister Nawaz Sharif this weekend in a major step towards better relations following rising tensions.
Singh said he will hold talks with Nawaz Sharif on the sidelines of the UN General Assembly, the first such meeting in three years, amid heightened friction over a string of deadly military attacks across their border in disputed Kashmir.
“During my visit to New York, I... look forward to bilateral meetings with the leaders of some of our neighbouring countries, including Bangladesh, Nepal and Pakistan,” Singh said in a statement before leaving for the United States.
Singh will first head to Washington to meet President Barack Obama to try to strengthen economic ties between the two world's largest democracies including on nuclear power, before leaving for New York.
“Over the past decade, our relationship with the United States, which is one of our most important relationships, has transformed into a global strategic partnership,” his statement said.
New Delhi and Islamabad have been working behind the scenes in recent weeks to secure a meeting, which was in jeopardy after deadly skirmishes in recent weeks between their militaries. The attacks repeatedly broke a ceasefire in place since 2003 along the de facto border in Kashmir.
The picturesque Himalayan region is divided between India and Pakistan by the UN-monitored Line of Control (LoC), but is claimed in full by both countries. Two of their three wars have been fought over Kashmir.
The deadly flare-ups followed an ambush in August that killed five Indian soldiers along the LoC. India blamed the Pakistan army for the attack, a charge that Islamabad denied.
Since winning a general election in May, Sharif has been vocal in his desire for better relations with India.
Last month he urged both sides to work swiftly to shore up the 10-year ceasefire after India's defence minister hinted at stronger military action along the LoC.
Analyst K. G. Suresh said the incidents in Kashmir, along with attacks by Pakistani militants on Indian soil, were among issues expected to be raised at the meeting — set to be held at a New York hotel on Sunday.
But Suresh told AFP that talk of a resumption of peace talks as a direct result of the meeting was premature. The talks were halted in January, shortly after they had resumed, following a deadly flare-up at that time along the LoC.
“The meeting is definitely a huge step forward (to improved relations),”said Suresh of the Vivekanand International Foundation think-tank.
“The Indian PM has taken a calculated risk by agreeing to meet Sharif ahead of elections next year,” he added.
India's embattled ruling Congress party faces national elections next year and is under domestic pressure not to be seen as too soft on Pakistan.
The premiers of India and Pakistan last met in 2010 on the sidelines of a regional summit in Bhutan's capital Thimphu, with both sides reaffirming the importance of moving forward with dialogue.
Peace talks were suspended for three years after the 2008 attacks in Mumbai which killed 166 people and which India blamed on Pakistani militants.
India has been demanding that Pakistan speed up trials for militants on its side thought to have been behind the attacks.
Russia will give the Security Council evidence implicating Syrian rebels in a chemical attack on 21 August, Foreign Minister Sergei Lavrov has said.
Syrian officials supplied the evidence, which Mr Lavrov has not yet seen.
A UN report released on Monday concluded the nerve agent sarin was used in the attack in Damascus, in which hundreds were killed.
The US blamed government forces for the attack, but Russia and Damascus have insisted that rebels were responsible.
The UN report did not apportion blame for the attack, which sparked diplomacy that culminated in a deal for Syria to hand over its chemical arsenal by mid-2014.
The report's author, Ake Sellstrom, told the BBC he believed that the task of finding and destroying Syria's chemical stockpile would be "stressful work", but was "doable".
Continue reading the main story
Jim MuirBBC News, Beirut
Analysis
Jim MuirBBC News, Beirut
The war of words over the use of chemical weapons in Syria - much of it aimed at saving face - was predictable.
But the fact is that Russia persuaded Syria to declare its weapons and let them be destroyed. What counts now is what actually happens, not what people say.
The first agreed deadline comes on Saturday, by which time Damascus is supposed to provide an inventory of its chemical arsenal. If that slides, doubts about its sincerity - and Moscow's credibility - will start to grow.
Before and since the Kerry-Lavrov agreement, Syria and Russia argued publicly that the rebels had used chemical weapons, either in the 21 August attack or elsewhere. But that did not prevent Syria agreeing to disarm at Moscow's behest.
He said much depended on whether the Syrian government and the opposition were willing to negotiate.
The disarmament deal was brokered by the US and Russia.
The penalty for any possible breaches by Syria are now being thrashed out by the UN Security Council permanent members.
Selective and incomplete
Mr Lavrov said there was plenty of evidence that pointed to rebel involvement in chemical attacks similar to the Damascus attack.
"We will have to find out who did it," he said.
Earlier Mr Lavrov's deputy, Sergei Ryabkov, said he had been given the evidence during a trip to Syria.
He said it needed to be analysed, and gave no details of its content.
Mr Ryabkov criticised the UN report, saying it was "distorted" and "one-sided".
"The basis of information upon which it is built is not sufficient, and in any case we would need to learn and know more on what happened beyond and above that incident of 21 August," he said.
"We are disappointed, to put it mildly, about the approach taken by the UN secretariat and the UN inspectors, who prepared the report selectively and incompletely."
Continue reading the main story
Daniel SandfordBBC News, Moscow
“Start Quote
The Russians and the Syrians are fighting on multiple fronts at the moment in the PR war”
Daniel SandfordBBC News, Moscow
In response to Mr Ryabkov's comments, Mr Sellstrom told the BBC he thought Russia was not criticising the report itself but the process, which he described a political matter and therefore not his remit
French Foreign Minister Laurent Fabius defended the UN report, saying he was surprised by the Russian reaction.
"Nobody can question the objectivity of the people appointed by the UN," he said.
Human Rights Watch has taken the trajectory of the rockets from the UN document and plotted their likely path.
The rights group said the likely launch site for the missiles was in a government military compound.
The UN inspectors were originally mandated to go to Syria to investigate three alleged chemical weapons attacks, at Khan al-Assal, Sheikh Maqsoud and Saraqeb.
But they were later ordered to shift their focus to the Damascus incident, which was the most deadly chemical assault.
They are due to return to Syria "within weeks" to complete their inquiry into the other attacks, and a report is due in October.
UN divided
On Tuesday the five permanent UN Security Council members met in New York to discuss a draft resolution put forward by the UK, France and the US.
They want a resolution containing the threat of military action against Syria if it fails to comply with the disarmament deal, but Russia opposes this.
A resolution under Chapter VII of the UN charter permits military action if other measures do not succeed. Chapter VI requires a purely negotiated solution.
The BBC's Daniel Sandford in Moscow says Russia has delivered a promise from Syria to give up its chemical weapons, and it seems that at this stage Moscow does not feel like giving the Western allies anything more.
Russia and China have three times blocked Western-backed Security Council resolutions against Mr Assad.
More than 100,000 people have died since the uprising against President Assad began in 2011.
Millions of Syrians have fled the country and millions more have been internally displaced.
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| The BBC talked to workers and onlookers in the area |
A gunman who died after killing 12 people at a naval installation in Washington DC has been identified as a former Navy serviceman.
Aaron Alexis, 34, of Fort Worth, Texas, died in a gun battle with police during the rampage at Washington Navy Yard.
Eight others were injured in the attack, which began at around 8:20 local time (12:20 GMT) on Monday.
US President Barack Obama ordered flags be lowered to half mast at the White House and on Capitol Hill.
He said he mourned "yet another mass shooting" and condemned the "cowardly act".
Valid entry pass
No motive is known for the attack, whose dozen victims ranged in age from 46 to 73, said the authorities.
Police initially responded to reports of two other armed suspects, but after exhaustive searches Washington Police Chief Cathy Lanier said on Monday night they were all but certain that Alexis was the only gunman.
Witnesses said the suspect sprayed bullets in a hallway and fired from a balcony down on to workers in an atrium at the heavily secured installation in the US capital.
He was reportedly armed with an AR-15 semi-automatic rifle, a shotgun and a handgun that he took from a police officer at the scene.
Chief Lanier told reporters that the attacker "was engaged in shooting with police officers" when he died. "There is no question he would have kept shooting," she added.
Valerie Parlave of the FBI said that the suspect, who was employed by a subcontractor that was working on a US Navy intranet network, had a valid pass to enter Washington Navy Yard.
Alexis was formerly a petty officer 3rd class who served full-time in the naval reserve from 2007-11, said the US Navy.
It was not immediately clear why he left the military, but unnamed military officers told US media there had been a series of misconduct issues during his service.
According to media reports, Alexis was a Buddhist convert who had had two previous gun-related brushes with the law.
Journalist Bud Kennedy describes Aaron Alexis as "serious" and "popular"
In 2004 he was arrested in Seattle for shooting a construction worker's car tyres, in what he described as an enraged "black-out".
And he was questioned by Fort Worth police in 2010 after firing his gun through the floor of an upstairs apartment. He said it was an accidental discharge.
In addition to those killed in Monday's rampage, one police officer was shot in the legs, a female civilian was shot in the head and hand, and another woman was treated for a shoulder wound.
All three were expected to recover, said Washington Hospital Center officials.
Five others required medical treatment, mostly for minor injuries, said Washington DC Mayor Vincent Gray.
As news of the shooting emerged, emergency vehicles and police surrounded the complex, while helicopters hovered overhead.
The US Senate buildings and six nearby schools were temporarily placed on lockdown as a precaution, while flight departures were briefly suspended at Reagan National Airport.
Eyewitnesses at Washington Navy Yard: Gunman 'aimed at us'
Patricia Ward, who works at Washington Navy Yard, said she had heard three shots, a pause, and then four more.
"Everybody was panicking and trying to decide which way to get out," she told reporters.
The Washington Nationals baseball team called off their game against the Atlanta Braves on Monday night at Nationals Park, not far from Navy Yard.
Monday's mass shooting occurred at a building that serves as the headquarters for the Naval Sea Systems Command, which builds and maintains ships and submarines for the Navy.
Washington Navy Yard is the US Navy's oldest shore installation, first opened in the early 19th Century, according to the Navy.
Law enforcement officers arrived on the scene within minutes of Monday morning's shooting.
Civilians were escorted from Washington Navy Yard as law enforcement searched for the gunman.
A helicopter rescues someone from Washington Navy Yard.
Dozens of emergency vehicles converged on the site as news of the shooting emerged.
Law enforcement officials were deployed on rooftops.
President Barack Obama ordered flags to be flown at half mast after the attack.Law enforcement officers arrived on the scene within minutes of Monday morning's shooting.
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| This time-lapse footage shows the first day of the Costa Concordia salvage operation |
Engineers in Italy have succeeded in setting the cruise ship Costa Concordia upright, 20 months after it ran aground off the island of Giglio.
They said that the unprecedented salvage effort "reached degree zero [vertical], which was our target".
In the operation that took all of Monday and most of the night, they used cables and metal boxes filled with water to roll the ship onto a platform.
The Costa Concordia capsized in January 2012, killing 32 people.
The bodies of two of the victims of the disaster, by the island of Giglio, have never been found. There are hopes that they may be located during the operation.
Continue reading the main story
Alan JohnstonBBC News, Giglio
'Double Titanic'Analysis
Alan JohnstonBBC News, Giglio
As dawn broke on Tuesday, the team that had masterminded the big lift steamed back into the little port of Giglio.
A hooter sounded and their colleagues cheered.
On the dockside the salvage crews - divers and engineers - stood outside one of the bars, beers in hand, starting to celebrate.
Nobody here is forgetting that this is the aftermath of a tragedy. The wreck will now be searched for the bodies of two people unaccounted for since the night of the disaster.
But removing the wreck poses a vast engineering challenge.
And there is huge satisfaction among the salvage workers that this phase of the operation has been pulled off perfectly.
A big Dutch diver called Danny spoke for many when he said that this had been "one of the jobs of a lifetime".
The ship was declared completely upright shortly after 04:00 local time (02:00 GMT) on Tuesday.
Franco Gabrielli, the head of Italy's Civil Protection Authority, said the vessel was now sitting on a platform built on the sea bed.
"A perfect operation, I must say," said Franco Porcellacchia, leader of the technical team for Costa Cruise, the owner of the ship.
He added that no environmental spill was detected so far.
"I think the whole team is proud of what they achieved because a lot of people didn't think it could be done," said salvage master Nick Sloane - but he added "it's not over yet".
When the vessel was finally righted in the early hours of Tuesday morning, there was a giant cheer from people gathered at Giglio harbour, says the BBC's Matthew Price, and rescue workers have been out celebrating with coffees.
As daylight broke, the now-upright, brown hulk of the ship was visible - its hull muddy and crushed from 20 months spent submerged on its side.
Booms and nets were put in place before the operation started - to combat any pollution threat in what is a marine national park.
The 114,000-gross tonnage ship - twice as heavy as the Titanic - was on Monday raised from rocks on which it had been lying and roll up onto her keel.
More than 50 enormous chains and winches were used to break the ship away from the reef - the process known as parbuckling.
During the marathon operation, the ship could be seen slowly emerging from the water.
The engineers had originally planned to complete the operation by Monday evening, but it had to be delayed by three hours because of a storm.
The procedure was carried out very slowly to prevent further damage to the hull, which spent months partially submerged in 15m (50ft) of water and fully exposed to the elements.
Officials now plan to fully inspect the vessel and begin to prepare the next stage - the effort to repair and refloat it and eventually tow it away to be destroyed.
Engineers have never tried to lift such a huge ship - over 951 feet long (290m) - before.
As the ship became visible at dawn following the "perfect" operation, the damage done to the hull after spending 20 months crushed under the weight of the ship was plain to see
This is one of the most daunting and complex salvage operations ever undertaken. "A lot of people didn't think it could be done," said salvage master Nicholas Sloane.
The ship was righted over an 18-hour operation that ended at 04:00 (02:00 GMT). A 500-strong team of divers and engineers have spent much of the past year stabilising the ship and preparing for this phase.
The operation began on Monday, as the salvage team gathered around the wreckage - with caissons visible at the side.
Giant metal chains and cables were attached to the Concordia to help raise it.
Dark lines marking previously submerged parts of the ship were evidence of its movement.
Teams working overnight were slightly delayed by a storm, but the sea and weather conditions were considered right for the operation.
Five people have been convicted of manslaughter over the disaster. The captain, Francesco Schettino, is currently on trial accused of manslaughter and abandoning ship.
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Concordia's dead and missing
- Dead: 12 Germans; six Italians (including Dayana Arlotti, 5, and father William Arlotti); six French people; two Peruvians; two Americans (Barbara and Gerald Heil, passengers); one Hungarian (Sandor Feher, crew); one Spaniard (Guillermo Gual, passenger)
- Missing: one Italian (Maria Grazia Trecarichi, passenger); one Indian (Russel Rebello, crew)
Giglio mayor Sergio Ortelli earlier said that the removal of the Costa Concordia would bring an end to "a huge problem that we have in our port and that we want to solve as soon as we can".
"Islanders can't wait to see the back of it," he said.
The small island's economy depends hugely on tourism and the presence of the wreck has discouraged visitors.
The salvage project has so far cost more than 600m euros ($800m; £500m) and is expe
