QUETTA - Unidentified people blew up three gas pipelines in Dera Bugti and a railway track in Dera Murad Jamali on Monday.According to reports, unidentified people had fitted explosives to three different pipelines in Loti area of Dera Bugti. The explosives went off with huge blasts, damaging all three pipelines and suspending gas supply to the purification plant. The law enforcement agencies rushed to the site and cordoned off the area.In another incident, a railway track exploded in Dera Murad Jamali area of Naseerabad district. Sources said unidentified people had planted an explosive device to a railway track near Pat Feeder Bridge, which exploded, destroying the railway line and suspending train service. Meanwhile, the personnel of Levies Force and Bomb Disposal Squad thwarted a bid to blow up a railway track near Saranan area of Pishin district. Five-kg explosive material was placed under a railway track.