The death toll from India's worst train accident in years has risen 146 after rescuers used cranes to lift the last of the twisted metal wreckage to check for bodies underneath.
About 2000 workers were clearing the tracks and checking for damage to the rail line in hopes of resuming traffic through one of India's busiest railway junctions by Monday evening, railway official Amit Kumar said.
The government called for an investigation into what caused the accident, promising to punish anyone found responsible.
The passenger train was about midway through a 27-hour journey between the cities of Indore and Patna when it slid off the tracks early on Sunday morning.
The impact was so strong that one of the coaches landed atop another, crushing the one below. Passengers were flung from their beds.
The accident killed at least 146, according to state official Debasish Panda. Doctors said 116 of the victims had been identified.
Roughly 226 people were hurt, including 76 with serious injuries, according to local police Inspector General Zaki Ahmad. Medical teams provided first aid near the site, while those in more serious condition were moved to hospitals.
Some railway officials told local media they suspected faulty tracks caused the derailment.
While accidents are relatively common on India's sprawling rail network, the derailment of the Patna-Indore Express Train was among India's deadliest in at least five years.
India's vast railway system is the world's third largest, but lacks modern signalling and communication systems.
Most accidents are blamed on poor maintenance, outdated equipment and human error.
According to a government report in 2012, about 15,000 people are killed every year in train accidents.
Prime Minister Narendra Modi - who tweeted that he was "anguished beyond words" by Sunday's accident - pledged last year to invest $US137 billion ($A186 billion) over the next five years to modernise India's railway network, which is used by about 23 million passengers a day.
