Four anti-government militants were killed as NATO-led forces aircraft targeted them while they were planting mines on a road in Wardak province 35 km west of Afghan capital Kabul Tuesday night, provincial administration said in a statement on Wednesday.

"Five insurgents were busy in planting mines on a road in Nurkh district, Wardak province Tuesday night when the NATO-led forces reconnaissance discovered and conducted air raid killing four on the spot and injuring another," the statement added.

Taliban militants fighting the Afghan government and the NATO- led troops are yet to comment.