GHOTKI: At least thirty persons were injured when a passenger bus turned turtle on National Highway near Ghotki, Geo News reported Thursday. According to police, a passenger coach enroute to Punjab from Karachi turned upside down due to over speeding near Tehsil Daharki. As a result of accident, at least 30 passengers including women and children were wounded. The injured were shifted to Daharki Hospital and others for treatment.