QUETTA: Gunmen in southwestern Pakistan attacked three trucks after they returned from delivering supplies to Nato troops in Afghanistan, police said Sunday.

The incident took place near the town of Wadh, some 380 kilometres south of Quetta, the capital of the restive oil- and gas-rich Balochistan province which borders Iran and Afghanistan.

“Unknown gunmen fired at three NATO trucks, one of them overturned and the two other trucks were set ablaze by the attackers,” local police official Juma Khan told AFP.

“There were no injuries to drivers,” he said.

Another police official confirmed the attack.

Nato trucks and oil tankers are regularly targeted with arson attacks blamed on insurgents attempting to disrupt two key supply lines that cross western Pakistan bound for foreign troops fighting in neighbouring Afghanistan.