At least two persons were injured while two oil tankers were torched as some unidentified persons fired two rockets at a convoy of NATO oil tankers in Khyber Agency on Monday, official said. The incident occurred in Jamrud area of Katha Kashta when some miscreants fired two rockets from near-by hills on the oil tankers. As a result, two persons were injured while two oil tankers were destroyed. After the attack, Pak-Afghan National Highway was closed for traffic and the security forces cordoned off the area.