An Afghan police official says at least two private security guards have been wounded and two fuel tankers set on fire in eastern Afghanistan when militants attacked a supply convoy for NATO forces.

Provincial police spokesman Ghafor Khan says the two were injured in a battle Sunday near Jalalabad between the enemy combatants and private guards providing security for the convoy. He says other tankers were damaged along the highway, a main supply route between Pakistan and the Afghan capital of Kabul.