At least 29 people have been killed after a bus they were travelling in went off an expressway in the northern Indian state of Uttar Pradesh.

The crash happened early on Monday near the city of Agra, 336km (208 miles) from the state capital, Lucknow.

The bus was carrying about 50 people and travelling from Lucknow to the Indian capital, Delhi.

Road accidents are frequent in India, with one taking place every four minutes.

Locals rushed to the spot to help and rescued 20 injured passengers.

Reports said that the driver fell asleep and lost control of the double-decker bus before it went off a highway and plunged into a canal below.