A sergeant says one person was fatally shot, with the shooter barricaded in a room. Using a P-A system, police announced a base lockdown, and police from the base and Prince William County surrounded the area.
The sergeant says when they finally entered the building, they found a second victim dead. They also found the shooter dead of a self-inflicted gunshot wound. A Marine spokesman says the suspect was a staff member at the Officer Candidate School.
The motive is unknown.