Details on #NavyYard shooter: Source tells @PierreTABC shooter was a former Navy official in his 50’s whose work status recently changed
— ABC News (@ABC) September 16, 2013
The officials spoke on condition of anonymity on Monday because they were not authorized to discuss the situation publicly.
A Defense Department official and a federal law enforcement official have said a shooter had died, though it was not immediately clear how.
Police are also looking into the possibility of a second shooter.
As many as 10 were wounded.