WASHINGTON (AP) - Police said Monday at least 12 people were killed in shootings at the Washington Navy Yard. One gunman is dead. Police believe as many as three gunman opened fire Monday inside one of the Navy's oldest buildings, attacking office workers at the heavily guarded military facility in the heart of the nation's capital.
The building that was targeted was the military's headquarters for Naval Sea Systems Command, which buys, builds and maintains ships, submarines and combat systems. About 3,000 people work at the headquarters, many of them civilians.