Washington Navy Yard Shooting

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  Washington Navy Yard on Lockdown Amid Reports of Shooter

  The Navy Yard in Washington was put on lockdown Thursday amid unconfirmed reports of an active gunman on the military facility, the scene of a deadly shooting two years ago, the US Navy said.

• FBI releases video of 'delusional' US Navy Yard shooter

  The FBI released surveillance video and photos of Navy Yard shooter Aaron Alexis on Wednesday and said he believed electromagnetic waves had been controlling him for months before the rampage that killed 12 people.

• Security check of Navy Yard attacker did not mention previous shooting offence

  The US Navy said on Monday it was unaware Navy Yard shooter Aaron Alexis had shot out a car's tires in Seattle three years before it let him into the service in 2007 and gave him a security clearance, only that he had "deflated" car tires.

• At Navy Yard service, Obama rails against 'routine' of gun violence

  President Barack Obama made an impassioned plea on Sunday for Americans to overcome their "creeping resignation" about gun violence and demand tougher gun laws following the country's latest mass shooting.

• 'I felt him breathe': escape from the Navy Yard

  The first bang sounded distant and muffled. On the fourth floor, Bertillia Lavern assumed somebody downstairs was setting up for an event and had dropped a folding table.

• US Navy Yard shooting: Investigators review erratic behavior of gunman

  Investigators focused on the erratic behavior of a former US Navy reservist who law enforcement officials say had reported hearing voices before he shot dead 12 people at a military base in Washington this week. The national conversation turned once again to mental health, and to gun control.

• Washington Navy Yard opens three days after massacre

  The Washington Navy Yard is reopening to workers three days after it a mass shooting in which a gunman killed 12 people.

• US missed 'red flags' about gunman: Pentagon chief

  US Defense Secretary Chuck Hagel acknowledged on Wednesday authorities missed some "red flags" that might have averted a deadly shooting rampage at the Washington Navy Yard, vowing to close any gaps in security.

• Mother of US Navy Yard shooter apologises for killings, says 'so, so very sorry'

  The mother of Washington Navy Yard gunman Aaron Alexis apologized to the victims today, and like his friends and colleagues, she too, was unable to offer any clues on his motive for the shooting.

• US lawmakers question Navy Yard shooting suspect's security clearance

  US lawmakers are calling for a review into how the suspected shooter in Monday's rampage at the Washington Navy Yard received and maintained a security clearance, despite a history of violent episodes.

• Washington Navy Yard shooting: Vishnu Pandit lived the American Dream

  Indian-American defense contractor Vishnu Pandit, who was shot dead during the mass shooting at the Washington Navy Yard, "lived the American Dream," said friends of the deceased Indian American.

• US Navy Yard shooting: security review ordered at naval bases

  The US Navy ordered a review of security at all naval and Marine Corps bases on Tuesday, after a gunman killed 12 people at the Washington Navy Yard.

• Washington Police seek motive for deadly US Navy Yard shooting

  Investigators on Tuesday tried to piece together what led a former US Navy reservist to open fire at a Washington base, killing 12 people before being gunned down by police.

• Washington shooting: Indian-American among those killed

  Indian-American Vishnu Pandit was among the 12 individuals killed by a gunman at a highly secure Navy Yard in the American Capital, the latest in the series of mass shootouts in the US in the last few years.

• Authorities confident one shooter only in US tragedy: police

  US authorities probing the shooting spree at Washington's Navy Yard, which left 13 people dead and eight injured, said Monday that one man only carried out the killings.