Unidentified miscreants set on fire three trucks loaded with coal in Harnai area of Ziarat on Saturday, reported 24NewsHD TV channel.
The incident occurred at Mangia area on Harnai-Ziarat main road where three trucks were torched. The trucks were supplying coal from Shahrag-Khost area of Harnai.
According to Ziarat Ceputy Commissioner Liaquat Ali Kakar, the gunmen also resorted to indiscriminate firing after torching the trucks.
Kakar said shot were also fired on the vehicle of SP Harnai who escaped unhurt but his gunman was injured.
Reporter Rahmatullah