12 DEAD AND 31 INJURED IN FORT HOOD SHOOTING!

MAIN SHOOTER HAS BEEN TAKEN DOWN WHILE TWO OTHERS ARE IN CUSTODY!

A shooting at the Fort Hood Army Post in Killeen has left 12 people dead and 31 injured, FOX 26 News has learned.

The shooting happened early Thursday afternoon at the post's "soldier readiness facility," where military personnel prepare to deploy.

A Fort Hood spokesman said the main shooter was shot and killed, and two other suspects were in custody. All were identified as soldiers wearing military gear.

U.S. Sen. Kay Bailey Hutchison told FOX News that the main shooter had stated a few days earlier that he was upset about getting deployed overseas to fight a war, but a clear motive was not yet known.

Military police have taken control of the scene, and the entire post is on lockdown.

There was a graduation ceremony going on at the time of shooting, but the identities of the wounded and dead was not immediately known. At least one of the dead was identified as a civilian police officer.

A member of Carter's staff, who was a base chaplain at Fort Hood before he retired, was attending the graduation ceremony, he said.

"I'm not sure--he was either in his car or as just getting out of his car when a soldier ran up to him and said, 'Sir, don't go that direction. There shooting over there,' and the soldier ran on," Carter said. "And when he ran on, (my staff member) saw that the soldier had been shot. And so they... went after the guy, they stopped him and told him he'd been hit and started treating him."

Carter said his staff member said everyone is being kept at the graduation building with locked doors.

"One shooter is a lot of people. They're having real emotional problems and mental problems from the stress of multiple deployments," Carter said. "But one I can see going berserk, maybe two got together and went berserk, but three seems a little too--if it's three--I just wonder; I have doubts."

FBI officials from the San Antonio office say they are en route to the base. They told FOX News that they're top priority "to help make sure there's no further killing."

Fort Hood serves about 50,000 soldiers, with 33,000 at the post during the shooting. Schools near the army base were placed under lockdown during the attack.