Local residents arrive to collect feul from bullet-ridden NATO supply oil tankers following an attack by gunmen on the main highway at Kolpur village, 25 kilometres (15 miles) south of Quetta, the capital of restive Baluchistan province on August 22, 2011.

Local residents rush toward a bullet-ridden NATO supply oil tanker to collect fuel following an attack by gunmen on the main highway at Kolpur village, 25 kilometres (15 miles) south of Quetta, the capital of restive Baluchistan province on August 22, 2011. Gunmen on motorbikes in southwestern Pakistan on August 22 set ablaze at least 19 oil tankers carrying fuel for US-led NATO forces in neighbouring Afghanistan, officials said.

A local resident fills a jerrycan with fuel from a bullet-ridden NATO supply oil tanker following an attack by gunmen on the main highway at Kolpur village, 25 kilometres (15 miles) south of Quetta, the capital of restive Baluchistan province on August 22, 2011.

A Pakistani firefighter walks to his vehicle next to burning oil tankers carrying fuel for NATO forces in neighboring Afghanistan, after being attacked by gunmen on the outskirts of Quetta, Pakistan, Monday, Aug. 22, 2011.

A Pakistani policeman stands guard beside burning NATO supply oil tankers following an attack by gunmen on the main highway at Kolpur village, 25 kilometres (15 miles) south of Quetta, the capital of restive Baluchistan province on August 22, 2011. Gunmen on motorbikes in southwestern Pakistan on August 22 set ablaze at least 19 oil tankers carrying fuel for US-led NATO forces in neighbouring Afghanistan, officials said.