At least seven passengers were killed and 40 others injured in a road accident on Indus Highway on late Saturday night. According to police sources, the passenger bus was bound to Peshawar from Karachi which met a tragic mishap due to over speeding near Rajanpur area, leaving seven passengers dead on the spot and around 40 injured, highway police said. Eleven among injured passengers were said to be in critical condition. Seven of them have been shifted to Rojhan Hospital and others injured are being treated in ICU ward of Guddu Hospital, sources said.