Around 18 blasts damaged railway tracks at different places across Sindh on Saturday but were repaired and train services started after a couple of hours, officials said. After restoration of tracks, trains held back at Karachi stations have been were sent to their destinations. No casualties were reported in the explosions. According to sources, 12 small blasts hit railway tracks at Karachi, Hyderabad, Sukkur, Nawabshah, Khairpur and Mirpur Mathilo. No group claimed responsibility for the blasts. Sindh Home Minister Manzoor Wasan said that the killing of Benazir Bhutto had increased the sense of deprivation in the province and railways blasts were its outcome.