Four service members were killed as a chopter of NATO-led International Security Assistance Force (ISAF) crashed in Afghanistan's southern Helmand province on Wednesday, a NATO statement said, Xinhua reported.
"Four ISAF service members were killed after their helicopter was brought down by hostile fire in Helmand province, southern Afghanistan, today,"the statement added.
However, the statement did not identify the nationality of the victims, but said "It is ISAF policy to defer casualty notification procedures to the relevant national authority."
Taliban militants claimed responsibility for the attack. Taliban purported spokesman Qari Yusuf Ahmadi told media via telephone from an undisclosed location the militants shot down the chopter.
It was a Chinook helicopter and went down in Sangin bazaar, he added.
So far this year, 245 service members of NATO-led troops have been killed in the militancy-plagued Afghanistan.