A US soldier has been arrested after a grenade attack at a rear US base camp in northern Kuwait which killed another serviceman and wounded 12 others.
Much of the 101st airborne is already in Iraq
A military spokesman said two grenades had been rolled into a command tent in Camp Pennsylvania, the base of the 101st US Airborne Division.
Eleven soldiers were evacuated to field hospitals in the area, while two others were treated at the scene.
However, military sources said one man had later died of his injuries.
"The carnage was pretty severe," said journalist Jim Lacey
from Time magazine, who was at the camp at the time.
Camp Pennsylvania occupies a large area of Kuwaiti desert and initially it was suggested a terrorist might have breached the tight security at the base.
But the suspect is a serving soldier belonging to the division.
The incident has provoked shock and utter disbelief among the troops that one of their own might have been involved.
US Army spokesman Max Blumenfeld said the motive for the attack "most likely was resentment".
The division has been based in Kuwait for about a week, but most of its personnel have already entered Iraq.
Correspondents say there are concerns in Kuwait about increasing hostility towards US troops, thousands of whom have been stationed in the country since the 1991 Gulf War.
In October last year, a US marine was killed during training on an island.
A month later, two US soldiers were shot and seriously wounded by a Kuwaiti policeman on a highway south of Kuwait City.
In January a US civilian was killed and one wounded near a military base north of the city.