Four international service members have died in a plane crash in southern Afghanistan.

Initial reporting of Saturday’s crash indicates there was no enemy activity in the area at the time, NATO said.

It has not been confirmed whether the victims, all working for the NATO-led International Security Assistance Force (ISAF), were military staff or civilians, nor their nationalities.

The military alliance did not confirm exact location of the crash but local authorities in the southern province of Zabul, said an aircraft belonging to foreign forces crashed Saturday afternoon in Shah Joy district.

Mohammad Jan Rasoulyar, deputy governor of Zabul, said the site had been surrounded by international forces.