Taliban militants claim their fighters have downed a helicopter belonging to the US-led forces in the northern Baghlan Province of Afghanistan.
Local Afghan officials said on Friday the chopper went down in Boorkeh city of Baghlan Province while it was carrying out a military operation overnight.
The Western coalition forces said the military aircraft made a hard landing.
However, the Taliban militant group said in a statement on Friday that all the US-led foreign troops on board the helicopter were killed in the troubled region during the late hours of Thursday.
This time of the year is known as the Taliban spring offensive, during which the militants step up their attacks on foreign and Afghan forces.
Taliban militants have increased violence against US-led forces in Afghanistan, targeting NATO helicopters and drones.
The rising death toll of US-led foreign forces in Afghanistan has also prompted growing opposition to the Afghan war in NATO member states and other countries that have contributed troops to the military occupation.