More than 20 tankers carrying fuel for US and Nato troops in Afghanistan have been set alight in Pakistan.
It was the first reported attack since Islamabad closed the border to protest at coalition air strikes that killed 24 Pakistani troops last month.
The attack highlighted the vulnerability of the supply trucks that are waiting for the country's two border crossings into Afghanistan to reopen.
Around 40% of the non-lethal supplies for US-led troops in landlocked Afghanistan travel across Pakistani soil.
Islamabad temporarily closed one of its Afghan crossings to Nato supplies last year after US helicopters accidentally killed two Pakistani soldiers.
Suspected militants or criminals took advantage of the impasse to launch many attacks against stranded or rerouted trucks carrying Nato supplies.
Police said attackers fired rockets at a terminal for the tankers close to the south-western city of Quetta. He said at least 23 tankers were set ablaze. There were no immediate reports of casualties.