The injured children were rushed to the nearby Sushruta Trauma Centre and Aruna Asaf Ali Government Hospital, said a senior police official.
There were around 30 students belonging to Rukmani Devi and Victoria Girls Senior Secondary schools in Civil lines.
"The incident happened at around 8 AM when the bus was coming from the ISBT flyover. Some pedestrians were crossing the road and the driver in a bid to stop the bus applied brakes. He is believed to have lost control over the vehicle and overturned," said the official.