Tank - At least four people including two paramilitary soldiers were killed in firing of armed miscreants on a vehicle of Frontier Works Organisation (FWO) here on Tuesday.

Police said unknown armed men equipped with heavy automatic weapons ambushed a vehicle of FWO in Deewan Shah Rourri area of Kalachi in district Tank. As a result of firing the vehicle was damaged resulting in death of four people on the spot.

A senior police officer said gunmen shot and killed two paramilitary troops and two workers for the army-owned company at a canal construction site.

Abdul Ghafoor Afridi said the incident took place Tuesday in the Kolachi area, where the army's construction wing, known as the Frontier Work Organisation, is building a canal.

Afridi says the gunmen fled after the shooting and that the motive is not yet known. No group has claimed responsibility for the attack.

Heavy contingent of security personnel cordoned off the area after the attack and launched a search operation in the area but no arrest could be made.

The police after registering a case against unknown assailants have started an investigation.