Although Jena and some media reports have suggested a freight train was also involved in the crash, railway authorities have yet to comment on that possibility.
An extensive search-and-rescue operation has been mounted, involving hundreds of fire department personnel and police officers as well as sniffer dogs. National Disaster Response Force teams were also at the site.
On Friday, hundreds of young people lined up outside a government hospital in Odisha's Soro to donate blood.
According to Indian Railways, its network facilitates the transportation of over 13 million people every day. But the state-run monopoly has had a patchy safety record because of ageing infrastructure.
The state has declared Saturday a day of state mourning as a mark of respect to the victims.
India's deadliest railway accident occurred in 1981 when a train plunged off a bridge and into a river in Bihar state, killing an estimated 800 people.
