UPDATE: 3:48p.m. CT:
Suspected gunman Aaron Alexis is reported to be a full-time Navy reservist who was based in Texas when he left the service in 2011. He was reportedly carrying an assault rifle and two other guns when he opened fire Monday morning at the Washington Navy Yard.
He was killed during an exchange of fire with police.
UPDATE: 3:22p.m. CT:
Police have confirmed 13 are now dead, including the gunman.
Officers are still looking for a potential second gunman, described as a black male in his 50s, wearing an olive colored military-style uniform. Another man thought to be a potential suspect, a white man in a khaki uniform, has been identified and cleared.
UPDATE: 3:16p.m. CT:
Three shooting victims are expected to survive.
The victims, a police officer and two civilians, are being treated at the MedStar Washington Hospital Center. The hospital's chief operating officer said during a Monday afternoon press conference that all three should recover well.
The officer was shot in his lower extremities, one woman shot in the shoulder, and the other woman shot in the head but the bullet did not pierce her skull.
UPDATE: 1:52p.m. CT:
According to NBC News, law enforcement officials have identified the deceased shooter as 34-year-old Aaron Alexis of Fort Worth, Texas. Alexis recently began working as a civilian contractor.
The DC Police Department has reported the white male in a khaki uniform they were looking for as a potential additional shooter has been identified and is not a suspect or person of interest.
UPDATE: 1:06p.m. CT:
Police have confirmed at least 12 fatalities in Monday's shootings.
There is still an active search for the two additional potential shooters. No motive is known at this time.
UPDATE: 12:05p.m. CT:
Witnesses described a gunman on the fourth floor aiming down at people in a first-floor cafeteria. Others described being shot at in a third-floor hallway. It was unclear if the witnesses were describing the same gunman.
Six are reported to be dead, with at least four others wounded, including a law enforcement officer.
UPDATE: 11:16a.m. CT:
An officer with the Metropolitan Police Department says in addition to one deceased shooter, there are two additional potential shooters, but the information has not yet been confirmed.
The potential shooters are described as a white male wearing a khaki uniform and beret and a black male wearing what appeared to be an olive colored uniform. It is not confirmed that the two individuals are involved with the military, but they were wearing military-style uniforms.
The two men have not been located.
UPDATE: 11:04a.m. CT:
The Associated Press is reporting at least six are dead in Monday morning's shooting.
UPDATE: 10:47a.m. CT:
Officials are saying at least one shooter is dead. Police are still looking into the possibility of a second shooter.
UPDATE 10:40a.m. CT:
A spokesman for the MedStar Washington Hospital Center said the facility is currently taking care of three patients that are in critical condition. One is a Metropolitan Police Department officer. He is suffering multiple gunshot wounds to his legs.
Two females are also being cared for at the hospital. One of the women is suffering from a shot to the shoulder and the other had a gunshot wound to the head and to the hand.
The spokesman said the weapon appears to have been semi-automatic.
The hospital has been told to expect more victims.
Several people are reported to be injured after a gunman opened fire at the headquarters of the Naval Sea Systems Command at the Washington Navy Yard Monday morning.
Four people are said to be dead and at least six more wounded, including a city police officer and a security guard. The Navy released the news of the shooting on its Twitter feed at 8:20 a.m. Eastern. NBC News is reporting authorities said the shooter is believed to be wounded and officers are going through the building, looking into the possibility of a second shooter.
A civilian working at the building, Terrie Durham, told NBC News the gunman appeared to be wearing dark fatigues. Another building employee, Todd Brundidge, said he heard a fire alarm go off and then saw the gunman turn a corner:
"He turned our way and started firing, and we ran downstairs to get out of the building," Brundidge described. "No words. He raised the gun and started firing."
Around 3,000 people work in the building and were told to take shelter in place. Area streets and bridges were closed and flights at Reagan National Airport have been temporarily stopped. Local schools are on lockdown.
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