Emily Brown, USA TODAY
USA TODAY - Details surrounding the Washington Navy Yard shooting are still developing, but here's a breakdown of the facts so far:
The Navy first reported via Twitter that there was an "active shooter" at Building 197 at the Navy Yard, and that shots had been fired at 8:20 a.m. ET
Thirteen total deaths are reported, according to Washington, D.C., Mayor Vincent Gray. Among the dead was the alleged shooter, Aaron Alexis. Of the 12 victims, 11 were dead on the scene and one person died in the hospital, he said. The victims killed were between 46 to 73-years-old, and seven of them have been identified. Mayor Gray said at a news conference Monday night that there are a total of 8 injuries, three of which are gunshot wounds.
Aaron Alexis is confirmed as the shooter by the FBI. Alexis had a history with guns. The 34-year-old New York city man was arrested in 2010 for firing a gun through the ceiling of his apartment in Fort Worth, Texas, while serving there in the Navy, according to a police report. He said it had been an accident. Washington Metropolitan Police Chief Cathy Lanier said at a press conference Monday night, "We do now feel comfortable that we have the single and sole person responsible for the loss of life inside of the base today." Earlier reports had indicated there may have been multiple shooters.
A federal law enforcement official who is not authorized to comment publicly told USA TODAY that Alexis purchased at least some of the weapons used in the assault within the past few days in Virginia.
Naval Sea Systems Command headquarters in Building 197 at the Washington Navy Yard. The headquarters is the workplace for about 3,000 people.
The sea systems command is responsible for engineering, building, buying and maintaining ships, submarines and combat systems for the fleet. The sea systems command is the largest of the Navy's five system commands, with an annual budget of nearly $30 billion.
• The White House announced it will postpone Michelle Obama's Musica Latina event.
• The Senate complex is on lockdown.
•The area around the Navy Yard has "shelter-in-place" orders.
•Marine Barracks Washington is on partial lockdown.
•Washington Nationals MLB game against the Atlanta Braves has been postponed.
•Flights in and out of Washington Reagan National Airport were stopped this morning but resumed before 11 a.m.