The fifth bogie of Archana Express running from Rajinder Nagar (Patna) to Jammu Tawi jumped off the track near Mughalsarai railway station here, a railway official said.
Mukesh Kumar, a native of Patna, who was sitting near the gate of one of the bogies, suffered a fatal fall, said Mughalsarai Government Railway Police (GRP) Inspector, Tripurari Pandey.
A woman passenger received minor injuries in the incident, he added.