A U.S military helicopter has crashed in Afghanistan, killing at least one American soldier and injuring 14.

A U.S military spokesman, Major Rick Peat, says the Black Hawk helicopter crashed in the eastern Afghan province of Khost.

He says four personnel were seriously injured and were evacuated to a hospital at Bargam air base, outside Kabul. The spokesman ruled out involvement of hostile fire.

"There was no fire and the cause of the accident is under investigation," Major Peat said.

Major Peat says the helicopter was destroyed in the crash but did not burn. He says other attack helicopters and ground troops were deployed to secure the site of the accident.

Thousands of U.S soldiers are stationed in the country to hunt remnants of the former Taleban government and the al-Qaida terror network.

More than 100 American soldiers have died since U.S. forces were deployed in Afghanistan in late 2001 to dislodge the Taleban from power. Many of the soldiers were killed in accidents.