10 people injured at Navy Yard; Pentagon 'believes there has been loss of life'
(CNN) -- A gunman dressed in all black fired shots Monday inside the U.S. Navy Yard, injuring at least 10 people, according to the Navy and a Washington police spokesman.
"We believe there has been loss of life and several injuries," Pentagon spokesman George Little said. The Navy tweeted there are "several confirmed injuries with reports of fatalities."
An "active shooter" remained inside the building, the Navy said.
Helicopters hovered overhead as police with riot and SWAT team gear swarmed the scene. In one chopper, there appeared to be a police sniper peering out, with a scope at the ready.
The Bureau of Alcohol, Tobacco, Firearms and Explosives sent a team of about 20 special agents to the scene, a law enforcement official said. The team was the same group that helped apprehend Boston Marathon bombing suspect Dzhokhar Tsarnaev, the official said.
The injured included a Washington police officer who has been hospitalized, and a base security guard officer, said Metropolitan Police Department spokeswoman Saray Leon.