No passenger was injured in the incident that took place at 6.55 AM after the train left Kanpur Central station, Amit Malviya, PRO, North Central Railways said.
The driver was informed about the incident and the coupling was fixed at the station, Malviya said, adding a probe is on in the matter.
Some panic-stricken passengers rushed out of their coaches and the train was halted for 35 minutes, he said.