Rescuers are combing through mangled wreckage after a train derailed in India's northern Uttar Pradesh state.
At least 133 people have died after the Indore-Patna Express derailed at 03:00 local time on Sunday (21:30 GMT Saturday), near the city of Kanpur.
The death toll could rise further as rescuers continue work, and with many of the injured in critical condition.
The cause of the crash is not known, though reports said a track fracture could be to blame.
Train accidents are fairly common in India, where much of the railway equipment is out of date.
Early on Monday the railway ministry published a list of names of injured passengers. Out of the 180 listed, 56 were said to be "grievously injured".
The derailment had the strongest impact on the first two carriages of the train, which crashed into each other and overturned. Most of the victims were located in these carriages.
According to the Indian Express the carriages were outdated and known for piling up in accidents. The report said the government had promised earlier this year to upgrade all trains.
The train may have also been carrying far more passengers that it was supposed to, reports said.
Although the official number of passengers was about 1,200, the Times of India said as many as another 500 could have been on the train without tickets, citing unnamed railway officials as sources.
Survivors, most of whom were sleeping at the time of the crash, described horrific scenes.
"I woke up suddenly around 3.10am and felt a tremor. The train came to a screeching halt. All of a sudden, I was crushed under a crowd of people… everyone was screaming for help," survivor Yaqoob Ahmed told the Hindustan Times.
"There was a loud sound like an earthquake. I fell from my berth and a lot of luggage fell over me,'' another passenger named Ramchandra Tewari was quoted by AP as saying. "I thought I was dead, and then I passed out.''
Anxious relatives of missing passengers have reached the scene. One man from Patna said he spotted a hand sticking out in the debris wearing a ring which he recognised as his brother's.
"I'm certain that it's my brother's body but it's not been removed yet," he told the BBC.
Indian Prime Minister Narendra Modi tweeted: "Anguished beyond words on the loss of lives due to the derailing of the Patna-Indore express. My thoughts are with the bereaved families.
"Prayers with those injured in the tragic train accident."
Mr Modi also promised compensation to the victims' relatives and injured passengers, and said he had spoken to Railways Minister Suresh Prabhu.
On his own Twitter account, Mr Prabhu warned that "strictest possible action will be taken against those who could be responsible for accident".