Nawada/Gopalganj: Seven persons were killed and 55 others injured in separate bus accidents in Nawada and Gopalganj districts of Bihar on Monday. A bus, carrying mostly brick kiln labourers, overturned and tumbled into a ditch in Nawada district in the early hours today killing five persons and injuring 50 others. Of the five persons who were killed, two were minors, the police said. Twelve passengers, who sustained serious injuries, have been referred to Patna Medical College and Hospital, where their condition was stated to be serious. The rest of the injured have been admitted to Rajauli sub-divisional hospital and Nawada Sadar hospital, he said. Rajauli Police Station Officer-in-charge Awadhesh Kumar said the driver had lost control over the vehicle. He may have dozed off at the wheel, he added. The accident occurred around 2 am on NH 31 near Andharbari village when the bus was on its way to Biharsharif, the district. (PTI)