Pakistani police officials and firefighters gather beside flames which erupted from the wreckage of NATO oil tankers following an unexploded timed device blast at a terminal on the outskirts of Peshawar on Feb 26. Four NATO tankers gutted by a series of blasts on Feb. 25 caught fire again when an unexploded timed device went off, wounding two people in northwestern Pakistan, police said. More than two dozen militants had struck a terminal on the outskirts of the northwestern city of Peshawar on Feb. 25 and planted devices on 12 out of 18 parked tankers carrying fuel for NATO troops in neighbouring Afghanistan.