Pakistani Taliban "set fire" to 20 trucks carrying ammunition to Western forces joining Afghanistan occupation on Sunday, the first major incident on a vital supply route through northwest Pakistan in several months, police said.

The trucks were parked at a depot on the outskirts of the city of Peshawar.

"They came in the dark and threw petrol bombs as a result of which 20 containers and trucks caught fire. They then opened fire while running away," senior police officer Ejaz Abid told Reuters.

Two guards were wounded, he said.

Reuters