WASHINGTON (AP) — A shooting rampage in the heart of a U.S. Navy complex left at least six people dead Monday. One shooter was killed, but police said they were looking for two other possible gunmen wearing military-style uniforms.
President Barack Obama said he is morning "yet another mass shooting" and called it a "cowardly act."
Officials said at least four people were wounded in the rampage at the Washington Navy Yard, including a law enforcement officer.
The shooting led to tightened security at the Capitol nearby.
Witnesses described a gunman firing down on a cafeteria from an upper floor and a gunman firing at people in a hallway on another floor.
Two Navy officials say at least six people were killed in the rampage. D.C. Mayor Vincent Gray said four people were wounded and taken to hospitals.
About 3,000 people work at the Naval Sea Systems Command headquarters, which builds, buys and maintains the Navy's ships and submarines and combat systems.
Todd Brundidge said he and other co-workers encountered a gunman in a hallway on the third floor. The gunman was wearing all blue, he said.
"He just turned and started firing," Brundidge said.
Terrie Durham said she also saw the gunman.
"He aimed high and missed," she said. "He said nothing. As soon as I realized he was shooting, we just said, 'Get out of the building.'"
Rick Mason said a gunman was shooting from a fourth-floor overlook in the hallway outside his office. He said the gunman was aiming down at people in the building's cafeteria. Mason said he could hear the shots but could not see a gunman.
Shortly after the gunfire, Mason said someone on an overhead speaker told workers to seek shelter and later to head for the gates at the complex.
Patricia Ward said she was in the cafeteria.
"It was three gunshots straight in a row — pop, pop, pop. Three seconds later, it was pop, pop, pop, pop, pop, so it was like about a total of seven gunshots, and we just started running," Ward told reporters.
Ward said security officers started directing people out of the building with guns drawn.
Janis Orlowski, chief operating officer of Washington Hospital Center, told reporters the hospital was treating three gunshot victims in critical condition.
A U.S. Park Police helicopter hovered over the Navy building and appeared to drop a basket with a person onto the roof.
Associated Press writers Lolita C. Baldor, Stacy A. Anderson and Ben Nuckols in Washington contributed to this report.
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