Four bombs exploded minutes apart on a railway line linking Pakistan with neighboring Iran, but there were no casualties, police and a railway official said Wednesday. The attack happened late Tuesday in Naushki, a town about 200 kilometers (120 miles) west of Quetta, the capital of southwestern Baluchistan province, said Maqbool Ahmed, an official with state-run Pakistan Railways. No train was scheduled to pass at the time of the explosions. Engineers were dispatched to repair the damaged track, he was quoted as saying by the Associated Press.