(AP) Defense official: Several killed, as many as 10 wounded in Navy Yard shooting. That same defense official also said the suspected shooter was "contained" but not in "custody".
Police and emergency crews gathered Monday morning outside the Naval Sea Systems Command Headquarters building, where the shooting was reported.
The Navy says three shots were fired and that that about 3,000 people work in the building. People inside the building have been directed to stay in place.
Naval Sea Systems Command is the largest of the Navy's five system commands and accounts for a quarter of the Navy's entire budget.
It builds, buys and maintains the Navy's ships and submarines and their combat systems.
Police from multiple local and federal agencies were responding along with SWAT crews.
President Barack Obama is getting frequent briefings on a shooting at the Washington Navy Yard.
The White House says the president had several briefings about the unfolding situation by senior aides.
The Navy says shots were fired Monday morning at the Naval Sea Systems Command headquarters, where about 3,000 people work. The Navy reports several people were injured.
The White House says Obama directed his team to stay in touch with the Navy, FBI and local officials.
Assoicated Press Reporting