The Taliban quickly claimed responsibility for the crash, but the coalition said in a statement to The Associated Press: "Taliban's claims are false."
It said the cause of the crash was being investigated by emergency crews that rushed to the site, but there was no sign of insurgent activity in the area at the time.
Capt. Luca Carniel, a coalition spokesman, said the aircraft crashed from a low altitude right after takeoff.
In another development, President Hamid Karzai accused US forces of killing four civilians and wounding one in the eastern province of Nangarhar yesterday after an American' convoy was attacked by insurgents.
In a statement issued by his office, Karzai "strongly condemned the killing of innocent civilians."
The US-led military coalition said it was still investigating the weekend clash, which left four soldiers with minor injuries and damaged a patrol vehicle. In a statement issued today, the coalition said the Taliban attacked the coalition patrol with small arms fire and roadside bombs as it moved through a local bazaar in the province where there were civilians.
