Naseema (30) and her two children, including six-year -old and four-year-old daughters, were killed when the private bus overturned after one of its tyre deflated, they said.
Police said the injured have been admitted to the hospital.
Station Officer Seohara Viresh Pal Singh said the bus was moving at a high speed due to which its tyre deflated and it overturned.
He said the driver has been taken into custody and the investigations were on.