Railway personnel engaged in checking the track noticed the crack at 7.30 am and informed the authorities.
A Kamakhya-Sealdah summer special train had arrived at Malda Town Railway Station at that time and was positioned on the same track.
The train had to be halted at the station for 90 minutes.
Inspector-in-charge of Malda Town Railway Station K G Dutta said, it was not a case of sabotage.
The railway track was "slightly displaced" as a result of the crack and was repaired within an hour following which train movement resumed at 9 am, he said.
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