Unknown gunmen in restive northwest Pakistan Tuesday attacked a container truck carrying supplies to Nato troops in Afghanistan, killing the driver, officials said.

It is the first such attack since Pakistan reopened its border to Nato supply convoys three weeks ago after a seven-month blockade staged in protest at a botched US air raid that killed 24 Pakistani soldiers at a border post.

No one has claimed responsibility of the attack as yet. However, the Pakistani Taliban had threatenedearlier to attack the supply trucks and kill its drivers if they tried to resume supplies to troops in Afghanistan

Tehreek-i-Taliban Pakistan (TTP) spokesman Ehsanullah Ehsan had told AFP that the Taliban “will not allow any truck to pass and will attack it,” hours after Pakistan confirmed it had decided to reopen vital Nato supply routes into Afghanistan which have been closed since November.

“We will not only attack the supply truck but will also kill the drivers (of Nato supply trucks),” Ehsan had said.