WASHINGTON (AP) - The U.S. Army says 12 people have been killed and 31 wounded in a shooting rampage on the Fort Hood Army base in Texas.

The Army says one shooter has been killed and two others apprehended on Thursday in the shooting and all are U.S. soldiers.
Fort Hood spokeswoman Sgt. Rebekah Lampan says authorities believe at least two gunmen were involved in the attack on Thursday. She says it is not known whether the shooters were soldiers or civilians.

Army spokesman Lt. Col. Nathan Banks says the first shooting began at about 1:30 p.m. at a personnel and medical processing office. The facility, called a Soldier Rating and Processing center, handles administrative details for soldiers.

Banks says two shooters were apparently involved. There was no immediate word on who they were, nor on identities of the dead.

Banks says the second incident took place at a theater on the sprawling base. nother Army official identified that site as the Howze Theater. That official, who requested anonymity to discuss an evolving incident, said a graduation had been scheduled for 2 p.m. at the theater.

The White House said President Barack Obama was notified of the shootings.
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Associated Press writers Lolita C. Baldor and Devlin Barrett contributed to this report.