HYDERABAD: Two separate explosions of low scale damaged the railway tracks in Jamshoro and Hyderabad districts on Thursday, disrupting the railway traffic for some hours but no casualties occurred in the incidents. The first explosion occurred on the upcountry track in the Khursheed Town area near the Kotri railway station in Jamshoro. According to the railway police, the blast of an improvised explosive device ripped off a half feet part of the track before Shalimar Express was scheduled to move through that track. Pakistan Express and Bahauddin Zakaria Express were also stopped at the railway stations. The police and personnel Rangers reached the spot and secured the place. The police said it was still not known who carried out that explosion and no group had taken the responsibility either. In another incident, a 9-inch part of the up-track was damaged in a low-intensity IED blast over 5 kilometers away from Hyderabad railway station. The incident happened near the Mirza railway crossing. The Hyderabad police secured the site and the personnel of the Bomb Disposal Squad (BDS) collected traces of the explosives.