A bomb exploded on a railway line in Pakistan's southwestern Baluchistan province early Sunday, damaging a section of track and delaying two trains, an official said. No one was reported injured in the pre-dawn explosion, the latest in a string of bombings targeting railroads in Baluchistan in recent months. The explosion destroyed a half-meter (two-foot) portion of track near Damboli, a town about 150 kilometers (90 miles) southeast of Quetta, the capital of Baluchistan, said Shoaib Ahmed, an official with the state-run Pakistan Railways. Two trains to Quetta were delayed about seven hours while the track was repaired, he said. Another bomb was found about one kilometer (less than a mile) from the site of the explosion and was defused, he said.