UPDATED 11:15 a.m.: Police report eight civilians are among the 10 who have reportedly been shot. CBS reports three people have died, with additional fatalities a possibility.There are also reports that multiple shooters were involved.

An unidentified gunman shot at least three people at the Washington Navy Yard this morning.

A Washington, DC police officer is among the people shot. Authorities say 10 people were injured. There are also reports of fatalities. The gunman is on the loose.

The Navy has confirmed the shootings at Naval Sea Systems Command Headquarters, where some 3,000 people work.

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