More than 30 people have been killed after 14 carriages of an Indian express train were derailed in northern Uttar Pradesh state, reports say.
The incident took place on the Indore-Patna Express just after 03:00 local time on Sunday (21:30 GMT Saturday) near the city of Kanpur.
The death toll is expected to rise as rescuers continue to work through the wrecked carriages.
More than 100 people have been reported injured.
It was not immediately clear what caused the coaches to derail.
Krishna Keshav, who was travelling in the train, told the BBC: "We woke with a jolt at around 3am. Several coaches were derailed, everybody was in shock. I saw several bodies and injured people."
Kanpur is a major railway junction and hundreds of trains pass through it every day.
Anil Saxena, a spokesman for the railway company, said trains were being diverted along other routes.
Train accidents are common in India, where much of the railway equipment is out of date.
About 23 million passengers use the country's vast network every day.