QUETTA: Unknown militants torched five containers, carrying back Nato supplies from Afghanistan to Port Qasim Karachi, in Balochistan's Bolan district on Monday.

Levies sources told Dawn.com that four motorcycle-riding militants opened fire on containers in Kambiri area of Bolan district adding that the drivers survived the attack.

Levies further said that the armed men set containers in fire after the drivers fled from the site.

The attackers  managed to escape  from the spot after the attack.

Levies and police personnel reached the spot and cordoned off the area as investigations into the incident went underway.

Levies said armed men went toward nearby mountains and a search operation was underway in the area.

Militants continue to target Nato supplies in this area for last six years.

There was no claim of responsibility till the filing of this report.