Quetta  - A pipeline supplying gas to the purification plant was exploded in restive Dera Bugti districtWednesday. According to reports, unknown miscreants plantedexplosives beneath a 16-inch diameter gas pipeline in Pir Koh area of Dera Bugti and detonated it. The gas supply to the purification plant was suspended due to the explosion. However, no causality was reported.Police have registered a case and started investigation into the blast.