Police say 2 shooters have killed 4, injured 8 on grounds of Washington Navy Yard

View Photo Gallery — 10 people shot at Navy Yard: Police search for active shooter on grounds of Washington Navy Yard in Southeast D.C.

By Peter Hermann and Maggie Fazeli Fard, Updated: Monday, September 16, 8:45 AM E-mail the writer

Police now believe two shooters, including one in fatigues, have killed four people and wounded eight others at the Washington Navy Yard on Monday, throwing the region into fear and chaos during the morning commute.

At least one of the shooters is “down,” police said mid-morning, but it was unclear whether that means the suspect has been arrested or shot. They said the other suspect remains at large, and police believe they have pinned down one between the third and fourth floors of one of the buildings on the installation in Southeast Washington.