A man brandishing an assault rifle, shotgun and handgun opened fire Monday inside a building at the Washington Navy Yard. The city police chief said 12 people were killed.
SWAT officers swarmed the building, the headquarters of the Naval Sea Systems Command, and a shooter there was killed, sources told NBC News.
Chief Cathy Lanier said there could be as many as two other suspects at large, one white and one black, both seen with firearms and wearing military-style uniforms. But reports conflicted in the chaotic hours after the rampage, and there was no confirmation of more than one person firing shots.
NBC News
Another mass shooting. Is there anything else to say?
12:55 PM PT: Mugshot of gunman
He was involved in a gun cleaning incident in which he discharged his gun into his floor and through the ceiling of his neighbor below him.
1:12 PM PT: There are three hospitalized victims, Two navy employees, One metro police officer. Two of three have had surgery, third didn't need it all are now stable.
1:41 PM PT: The Washington D.C. mayor and the police chief said there were 13 total fatalities in the shooting at the Naval Sea Systems Command
FBI released images of Gunman and request for any information on the suspect.