At least seven people were killed and 20 wounded in a pair of shootings Thursday at the Fort Hood, Texas, the Army said.
An army spokesman said the base was locked down after the shootings. Another official told The Asociated Press that at least one shooter had been caught.
The FBI was sending agents to the scene.
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.