The Navy is confirming a shooting at the Navy Yard in DC. Latest reports are that it is an ongoing shooting. You can track developments at TPMLiveWire.
For those not familiar with DC, Washington Navy Yard is in southeast Washington, roughly a mile from the Capitol building. Navy Yard is near the relatively new Nationals Park, which is the centerpiece of the redevelopment in that area: lots of new office and apartment high rises. It is the oldest military installation in U.S. and remains an active Navy facility. It’s relatively open to the public, with the National Museum of the U.S. Navy and a decommissioned destroyer-turned-museum both housed there.