Kuwait City ? Grenades exploded early today at a 101st Airborne base in Kuwait, killing one and wounding 13 servicemen, and a U.S. soldier was detained as a suspect in the attack, the Army said.

Three of those wounded were undergoing surgery, the military said. The status of the fourth was not announced.

The suspect, who was found hiding in a bunker, is assigned to the 101st Airborne, military officials said. The motive in the attack “most likely was resentment,” said Max Blumenfeld, a U.S. Army spokesman. He did not elaborate.

Ten of those wounded had superficial wounds, including puncture wounds to their arms and legs from fragments of the grenade, said George Heath, civilian spokesman for the 101st’s home base at Fort Campbell, Ky. Helicopters evacuated 11 to Army hospitals, Blumenfeld said.

The attack at 1:30 a.m. (4:30 p.m. CST Saturday) apparently used only grenades. It took place in the command center of the 101st Division’s 1st Brigade at Camp Pennsylvania, Blumenfeld said.

The command tent, the tactical operations center, runs 24 hours a day and would always be staffed by officers and senior enlisted personnel, Blumenfeld said.

Names of the wounded were not released, and Blumenfeld did not say if any high-ranking officers were hurt.

The suspect is an engineer from the engineer platoon that was attached to one of the infantry battalions, said Col. Frederick B. Hodges, the 1st Brigade’s commander.

Hodges said he was asleep when a sergeant woke him up.

“I immediately smelled smoke,” Hodges told Britain’s Sky News television. “I heard a couple of explosions and then a popping sound, which I think was probably a rifle being fired. It looks like some assailant threw a grenade into each of these three tents here.”

The suspect, whose name was not released, has not been charged, Blumenfeld said. Investigators do not know if others were involved, Blumenfeld said.

Two Middle Eastern men who had been hired as contractors were detained and later released, Heath said.

Earlier, Heath said the attack appeared to have been carried out by terrorists. Military officials had said the attacker used two grenades and small-arms fire.

Camp Pennsylvania is a rear base camp of the 101st, near the Iraqi border. Kuwait is the main launching point for the tens of thousands of ground forces — including parts of the 101st — who have entered Iraq.

Near Camp New York, another encampment in Kuwait, a Patriot missile hit an incoming missile near, a military official said, speaking on condition of anonymity. There were no reports of injuries or where debris from the missile might have landed. Camp New York, which is near Camp Pennsylvania, was the largest of the desert staging camps.

Jim Lacey, a correspondent for Time magazine, told CNN that he was about 20 yards away when explosions at Camp Pennsylvania went off at what he said were two tents that housed division leadership.