Six people were killed and more than 10 injured when a bus travelling from Delhi to Bihar lost control and overturned on the Agra-Lucknow Expressway, police said.
The accident occurred at kilometre number 262 in the Auras police station area, said Auras Station Officer Sanjeev Kushwaha.
A sub-inspector and a prisoner were among those killed. The deceased sub-inspector, Ramchandra, had travelled from Siwan, Bihar, to Delhi with prisoner Chhatrapal and was returning from there.
The seriously injured have been referred to the Lucknow Trauma Centre.