On September 16, 2013, a shooting took place at the Yard. Shots were fired at the headquarters for the Naval Sea Systems Command Headquarters building #197. At least 17 people, including at least eight civilians, one D.C. police officer and one peacekeeper, were shot. Thirteen fatalities were confirmed by the United States Navy and D.C. Police. Officials said the gunman, Aaron Alexis, a 34-year-old civilian contractor from Queens, New York, was killed during a gun battle with police.