BY: ABC NEWS
A gunman who terrorized the Navy Sea Systems Command headquarters building in Washington, D.C., was shot and killed after carrying out a shooting spree that left four others dead and at least ten injured, according to officials.
The shooter is described as a former Navy official in his fifties whose work status was recently changed. His name has not been released.
President Obama, who was briefed on the shooting, was expected to address the situation, the White House said.
Two law enforcement officers were among the injured when the suspect fired shots inside the 3,000-person building at 8:20 a.m. Law enforcement officials initially told personnel to evacuate the building but they were later told to shelter in place.
Multiple reports cited the possibility of a second shooter, however, it has not been confirmed.
A spokesman for the Bureau of Alcohol, Tobacco, Firearms and Explosives sent a team of special agents to help secure the scene. This is the same team that helped apprehend Boston Marathon bombing suspect Dzhokhar Tsarnaev, according to the spokesman.
Three gunshot victims were taken to Washington Medical Center with "severe injuries," according to Janis Orlowski, chief medical officer at the hospital.
The victims were described as a male Metropolitan police officer who had "multiple gunshot wounds to his legs," a woman who was shot in the head and the hand and another woman who was shot in the shoulder.
Orlowski said all three are in critical condition, however they are conscious and are expected to survive.
She said the hospital is expecting to receive more victims, but she was not sure how many.
Patricia Ward, a logistics management specialist at the Navy Yard, said she heard a series of shots, at least seven, in rapid succession.
"A few of us just ran outside the side exit," Ward said.
Outside the building she saw a security with her gun drawn who told them to run and shelter.
Ward said the building has security.
"You need a car to enter the building. It's very hard to get in without a card," she said.
"Being with the incident that happened today, not secure enough for me," Ward said.
Planes have resumed flying out of nearby Reagan National Airport after a ground stop was imposed by the FAA due to the ongoing situation at Navy Yard earlier this morning, a Metropolitan Washington Airports Authority spokeswoman tells ABC News.
The Naval Sea Systems Command, the largest of the Navy's five commands, is responsible for engineering, building, buying and maintaining ships, submarines and combat systems in the Navy's fleet.