Police: Navy Yard shooting an 'active investigation'
16 September 2013 Last updated at 23:59 BST
Washington DC police chief Cathy Lanier has warned people to stay away from the Navy Yard area in Washington after 12 people were killed by a former Navy serviceman.
The gunman has been identified as Aaron Alexis, 34, of Fort Worth, Texas.
He died in a gun battle with police during the rampage at Washington Navy Yard.
Mrs Lanier said a police officer who had been shot in the legs, was recovering from "serious injuries" in hospital.