The Pakistani Taliban claimed responsibility for the assault, which also left one driver wounded.

Islamist militants and criminals in Pakistan frequently attack trucks carrying supplies for U.S. and NATO troops. The supplies typically arrive in Pakistan's southern port city of Karachi and travel overland to neighboring Afghanistan.

The latest attack occurred in the Dera Murad Jamali area of Baluchistan province, said Fatteh Mohammed, a local government official. The trucks were likely headed to the border crossing in the town of Chaman, the smaller of two such crossings into Afghanistan.

The home secretary of Baluchistan, Akbar Hussain Durani, said 136 NATO tankers were destroyed in 56 such attacks last year in the province. Some 34 people died and 23 were wounded in the attacks, he said.

AP