KHYBER AGENCY - Seven Nato oil supply tankers were destroyed in attacks by militants on Monday here in Torkham. Sources revealed that last evening an explosive device installed beneath a supply tanker of the allied forces went off in Torkham parking hub. The tanker caught fire that soon engulfed other three tankers parked nearby, sources in political administration and Khasadar force informed. No casualty was reported while the fire brigade and local political administration officials rushed to the scene and vacated the parking point to avoid further loss. Militants have been targeting the vehicles carrying logistics supply to the US-led Nato forces stationed in Afghanistan. Since last months blast and attacks on Nato tankers, the miscreants have gutted dozens of Nato tankers.