Chief Lanier: We are comfortable now to lift shelter in place order. Comfortable we have the single person responsible for shooting @WTOP
Why uncertainty over number of shooters? "There was potential that there could have been other shooters involved," Lanier says.
According to city employee database, Williams has been on the force since 1990 and is listed as a dog handler.
FBI: Aaron Alexis had "legitimate access" to Washington Navy Yard and used a "valid pass."
FBI: We continue to work to figure out where the suspected shooter has been, who he was with and the origins of where he got his weapons
Mayor Gray: 7 families of victims who were killed have been notified, not sure how long it will take to notify rest of families @WTOP
Mayor Vince Gray: Eight people injured in the #NavyYardShooting, three of whom were shot.
'Aaron Alexis lived in bungalow in woods near a Buddhist temple where he joined Thai immigrants in meditation' http://t.co/pIS2YIhYBp
DC mayor: Shooting victims, other than suspected shooter, range in age from 46 to 73. Authorities have reached about half of families.
MPD officer shot at Navy Yard identified by @mayorvincegray as Scott Williams
Pentagon officials: The Navy will wait 24 hours before releasing the names of those killed in the shooting. http://t.co/GWwgjS0QXB
MORE: @PeteWilliamsNBC reports authorities in process of obtaining search warrants for suspected gunman's rental car, hotel room.
Additionally the next press briefing will be held at 200 I St., SE at approximately 10:00 pm.
Not all names will be released because authorities are still in the process of contacting family members.
New: We are hearing that at 10pm press conference, the identities of some of the victims will be released.
“Shortly before 7pm, officers found an employee hiding in a locker, where the employee had been for nearly 11 hours.” http://t.co/HcXEzpTTeW
Navy: tomorrow navy yard will be open. Only essential personnel will report
Police are now looking for shooters car in and around Navy Yard. Its described as Black Nissan with Texas tag BJH-7396.
U.S. Park Police aviation unit dropped SWAT officers via hoist onto the roof of building 197 today. They then extracted four people same way
The Washington Monument at dusk, with the flags at half-mast. http://t.co/InLmqIQPx6
Aaron Alexis had history of shootings, anger management; discharged from Navy for "pattern of misconduct." Yet hired as defense contractor.
Bystanders near the White House say a man threw a firecracker over the fence, then another before being tackled -@KunkleFredrick
Ah - Secret Service says a dude threw firecrackers over the White House fence - it wasn't shots.
Police just cordoned off Lafayette Park across from White House. Cops and offender in distance, lights flashing. http://t.co/IeX3QGks1E
Just witnessed something outside the white house, two firecracker sounds. Police tackled the guy, who was by himself http://t.co/F6v6OMoK1K
Secret Service now clearing the entire North Lawn for safety http://t.co/I8N8fGRUt6
heard shots outside wh gate --
@Secnav Mabus tells CNN: Aaron Alexis was "at one point" a Navy contractor after his discharge in 2011; unclear what his current status was