Unidentified militants today blew up a pipeline, carrying natural gas, in Baluchistan’s Dera Bugti district, south west of Pakistan.Security sources said the unidentified militants blew up the pipeline disrupting the flow of gas from fields to factories in the area, adding that repair operations will start later in the day.Sabotage of gas pipelines is a characteristic tactic of tribal militants and is frequently witnessed in Baluchistan. A similar attack was carried out last week, where the pipeline supplying natural gas to Sui purification plant from well number 41 of Pir Koh gas-field was blown up. Earlier on January 11, an 18-inch Sui gas pipeline was blown up by unknown miscreants in the Dera Murad Jamali area of Balochistan.