Two persons including a Khasadar force official were killed and another injured in an armed attack on NATO tankers here in Landikotal on Thursday. According to sources unknown miscreants attacked a convoy of Nato tankers carrying fuel supply for Nato and Isaf forces in Sheikhwal area of tehsil Landikotal of Khyber Agency. A Khasadar force official was killed on the spot in the attack while two others sustained wounds. The injured were shifted to Peshawar where another injured driver succumbed to his wounds. The political administration cordoned off the area and started search operation but the attackers fled the scene.