Unidentified men blew up two gas pipelines in Dera Bugti and Pir Kho on Sunday.
According to Levies sources, both pipelines of 8-inch diameter were exploded with the gap of 10 minutes, disrupting the gas supply to the plant.
Levies and Frontier Corps (FC) personnel besieged the entire area to start investigation.
Earlier, FC recovered and diffused a bomb installed near a gas pipeline in Peer Sehwari area of Dera Bugti.
According to the FC officials, security forces patrolling the area of Peer Sehwari recovered a 7-kg bomb planted near an 8-inch gas pipeline and foiled a terror bid.
Security forces, later, besieged the area and initiated a search operation.