Tehreek-e-Taliban Pakistan (TTP) on Sunday claimed responsibility for the latest attack on a NATO supply convoy in the southwest and vowed they would continue until US drone strikes are stopped. "We accept responsibility for the attacks on the NATO supply trucks and tankers in Sibi district on Saturday," Tehreek-e-Taliban Pakistan (TTP) spokesman Azam Tariq told AFP. "We will continue the attacks on NATO trucks and tankers until the drone strikes are stopped," he said in a telephone call from an undisclosed location. Gunmen on Saturday torched at least 29 oil tankers in southwest Pakistan, the sixth attack in just over a week on vehicles carrying supplies for the 152,000-strong foreign forces fighting the Taliban-led insurgency. Previous attacks have also been claimed by Taliban. Two police officers were hurt in the attack in remote Mitri area of Sibi district, 180 kilometres (112 miles) southeast of Quetta. "Some 30 gunmen attacked the tankers, which were parked outside a roadside hotel and opened fire early Saturday morning, injuring two local police officials," Abdul Mateen, a senior administration official in Mitri, told AFP.