QUANTICO (AP) -- Officials say a Marine killed a male and female colleague at Marine Base Quantico before killing himself.
It began with a shooting around 11 p.m. Thursday and the situation had ended by 2:30 a.m. Friday.
Col. David Maxwell, the base commander, said the shooting was confined to Taylor Hall and that all three Marines were permanent personnel assigned to Officer Candidate School.
He also said there was no standoff or barricade at the barracks, saying earlier media reports were wrong.
The base was put on lockdown after the shooting, but the lockdown was lifted early Friday. During the lockdown, residents were warned over a loudspeaker to stay inside.
Prince William County authorities also responded to the shooting.
The base, which is about 37 miles south of Washington, is also home to the FBI's training academy.
The identities of the victims will be withheld until after primary next of kin notification. The incident is under investigation.
"We ask for patience during the investigation. I expect it will be a lengthy one," Col. Maxwell stated.
Base and unit chaplains were conducting counseling for the families and co-workers affected.
In 2010, the base was one of several targets of an ex-Marine reservist who, during five nighttime shootings, fired on military targets including the Pentagon. Yonathan Melaku, on two separate occasions, fired at the National Museum of the Marine Corps in Quantico. No one was injured and Melaku was ultimately sentenced to 25 years in prison.