Three shots were fired in the building where 3,000 people work.
UPDATE -- Washington Navy Yard shooting: At least six are dead, officials say
A Defense Department official says several people have been killed and as many as 10 have been wounded in a shooting at the Washington Navy Yard.
The official spoke on condition of anonymity today because the official was not authorized to discuss the matter publicly.
The official also says the shooter is “contained” but not yet in custody.
Earlier in the day, the U.S. Navy said it was searching for an active shooter at the Naval Sea Systems Command headquarters, where about 3,000 people work.
The exact number of people killed and the conditions of those wounded was not immediately known
CNN reports two of the injured were law enforcement officials.Police and emergency crews gathered this 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.