Peshawar- At least two people were injured today when unknown militants attacked a NATO supply convoy on the Pak-Afghan Highway in Jamrud Tehsil of Khyber Agency . Some nearby vehicles also sustained minor damage. Line officer Amjad Khan said that the convoy of trucks was targeted near the Sur Qamar area about 10 kilometres from the Bab-i-Khyber on the main Peshawar-Jalalabad Highway. Officials reported that the militants fired two rockets on the trucks and used heavy machine guns and rifles to target the supply convoy .  Security forces and militants also exchanged fire for half an hour which led the militants to flee. A heavy contingent of Frontier Corps and Khasadar Force also reached the spot and cordoned off the area as a search operation went underway.