As of 9:50AM ET, Naval officials said that the gunman was still on the loose. According to the Navy's Twitter feed, three shots were fired at 8:20 a.m. ET at the headquarters of the Naval Sea Systems Command, part of the Washington Navy Yard. Almost an hour later, the Navy still characterized the shooter as “active.”
Washington city police told WRC, the NBC affiliate in Washington, that an officer was among those shot. Tim Hogan, a spokesman for Rep. Steven Horsford of Nevada, posted photos to his Twitter account of people tending to at least one person down on a street corner.
S.W.A.T. teams swarmed the building and were hunting for the gunman. WRC, the NBC affiliate in Washington, reported that the shooter had a rifle. About 3,000 people work in the Naval Sea Systems Command building, the Navy said. They were ordered to stay in place. Military police, U.S. Capitol police and Washington city police were all responding. The Capitol police said they were stepping up security on the Capitol grounds. Washington police told WRC that nearby schools were locked down, and some bridges were closed.
The Naval Sea Systems Command builds, buys and maintains ships and submarines and their combat systems. The Navy Yard is along the Anacostia River in Washington, D.C. near the headquarters of the Department of Transportation and the Washington Nationals baseball stadium. This is a developing news story. Please check back for updates.