(CNN) -- At least seven people are dead and between 12 and 15 wounded in shootings at Fort Hood in Texas on Thursday, senior Pentagon official told CNN.
Two shooters were involved in the incident, and one has been apprehended, Fort Hood spokesman Sgt. Maj. Jamie Posten told CNN.
"At this point we're looking for the other shooter." Asked for a description, he said, "we're trying to develop that information."
On the Fort Hood Web site, the word "closed" is posted with the statement, "Effective immediately, Fort Hood is closed. Organizations/units are instructed to execute a 100 percent accountability of all personnel."
Fort Hood was asking people on post to stay away from windows, CNN affiliate KXXV said. The incident took place at the sports dome, now known as the soldier readiness area, the station reported.
FBI agents are headed to the scene to assist, said Erik Vasys, spokesman for the FBI office in San Antonio. He had no other details.
Fort Hood is the Army's largest U.S. post, with about 40,000 troops. It is home to the Army's 1st Cavalry Division and elements of the 4th Infantry Division, as well as the 3rd Armored Cavalry Regiment and the 13th Corps Support Command. It is located near Killeen, Texas.
Obviously, the fact that more than one shooter -- as many, it seems as three -- were involved in this clearly indicates a conspiracy, and for this kind of target, it could be ideological.