Railway sources said the Azimganj-Burdwan train was slowing down while approaching Gadaipur station, 60 km from here, at about 4.30 am when the driver applied the emergency brake.
The sources said that efforts were on to put the rakes back on track. There was no casualty.
As a result of the derailment, movement of trains on the Azimganj-Rampurhat section of the Howrah division was disrupted, the sources said.
