KABUL, Sept. 5 (Xinhua) -- Two soldiers with the NATO-led International Security Assistance Force (ISAF) were killed as helicopter crashed in Afghanistan on Wednesday, the alliance said in a statement.
"Two International Security Assistance Force service members died following a helicopter crash in eastern Afghanistan today," the statement said.
However, it did not identify the nationalities of the victims and exact place of the incident, saying it is ISAF policy to defer casualty identification procedures to the relevant national authorities.
The statement also said the cause of the crash is under investigation.
Troops mostly from U.S. have been stationed in the eastern region bordering Pakistan's Tribal areas.
Taliban militants fighting the Afghan government and NATO-led troops have yet to comment.
More than 320 soldiers with the NATO-led forces with 246 of them Americans have been killed in the conflict-ridden Afghanistan so far this year.