by Naureen Khan @naureenindc September 16, 2013 9:03AM ET Updated 2:15PM ET

At least one suspect dead, two other suspects believed still at large

WASHINGTON — Twelve people were killed in a shooting Monday morning, and a number of others injured, at the U.S. Navy Yard, Washington Police Chief Cathy Lanier told reporters. Among those shot were two police officers.

Shots reportedly first rang out at 8:20 a.m. in Building 197, headquarters of the Naval Sea Systems Command, which is about 1.5 miles southeast of the U.S. Capitol and the National Mall.

Multiple victims inside the Navy headquarters are dead, according to Lanier. Washington Mayor Vincent Gray described the event as an “isolated incident” and said that no other facilities in the city are involved.

Monday’s attack has resulted in the most fatalities in a mass shooting this year.
One of the police officers wounded in the shooting is in surgery and in stable condition at a hospital, according to Lanier.

Washington Hospital Center representative Janis Orlowski said it is treating three victims, all of them in critical condition, and it expects to receive more victims.

Lanier said one suspect is dead. She added that there may be two other suspects at large. One is reportedly a black male about 50 years old with a rifle and wearing a drab olive military uniform.

Police describe the other suspect as a white male with a pistol, wearing a Navy-style short-sleeve uniform and a beret. It’s not clear what, if any, relationship the shooters have to the military. About 3,000 people work at the Navy headquarters.

SOURCE: http://america.aljazeera.com/articles/2013/9/16/one-injured-in-usnavyshootinginwashingtondc.html