( CNN ) -- Dozens of oil tankers carrying fuel for NATO forces caught fire Saturday after gunmen attacked in Pakistan 's western Baluchistan province , local police said . Unknown assailants attacked 28 vehicles with a machine gun and rockets , said Meeran Bukhsh , a police official in the Bolan district . Two people were injured , police said . The attack is the latest in a series of strikes against vehicles in Pakistan carrying fuel for NATO forces in Afghanistan . The convoys are generally operated by contracted Pakistani firms , using Pakistani trucks and drivers . At least six attacks have been carried out since October 1 , leaving at least seven people dead . The Pakistani Taliban has claimed responsibility for several of the attacks , including one on Wednesday that damaged 54 oil tankers . Ihsan Ullah Ihsan , a spokesman for the Pakistani Taliban , said Wednesday 's attack was carried out by a special squad created especially to attack American assets in Pakistan as a response to the increase in suspected U.S. drone strikes . `` We are satisfied by the performance of our special squad , '' Ihsan said this week . CNN 's Samson Desta contributed to this report .
The attack comes after a series of recent strikes on vehicles carrying troops for Afghanistan . Two people are injured . The Pakistani government claims responsibility for several previous attacks .