Police sources said that the incident took place on Yamuna Expressway late on Sunday night when the double decker bus from Delhi to Darbhanga hit the divider and overturned killing three passengers on the spot.
"District Magistrate Pulkit Khare and Senior Superintendent of Police (SSP) Shailesh Kumar Pandey after getting the information reached the spot and got the passengers trapped in the bus out," they said.
Police sources said that the injured have been admitted to the district hospital.
"The identity of the deceased passengers could not be ascertained and there is no information about the driver of the bus," they said.
Chief Superintendent of the district hospital Dr Mukund Bansal said that 17 people were brought to the hospital from where six were referred to Agra Medical College in serious condition.
(With UNI inputs)