Gunmen opened fire on an Afghanistan-bound convoy of Nato fuel supply trucks in the Shikarpur area of southern Sindh province, and set fire to six of them, police officials said.

The tankers were parked outside a restaurant when they were attacked.

According to the police, four oil tankers were put on fire in the jurisdiction of Humayun Police Station that were carrying fuel for NATO forces in Afghanistan.

Police and fire brigade personnel reached the scene and extinguished the fire. Traffic was also blocked on the highway due to the incident.

It is the third time in two weeks when nine NATO oil tankers have been destroyed.