Two school girls were killed andfive other children were injured when the vehicle they were travelling in overturned in the neighbouring Chitrakoot district, a senior police official said today.The students of a school in Kol Gadhiya village had taken a lift in the tractor-trolley yesterday afternoon on their way home when it overturned while negotiating a turn, Superintendent of Police Manoj Kumar Jha said.Shanti (12) and Vibha (13) died on the spot, Jha said.Five other school children were injured and admitted to a hospital, he said adding that the driver fled the scene leaving the tractor-trolley behind.