The employee, Kallol Roychoudhury (56), was returning to his Behala home in South Kolkata from Cooch Behar in North Bengal where he was posted.
He got down at Bandel station from Paharia Express this morning with his colleague and was supposed to catch another train to come to Kolkata.
But then, he decided to withdraw some money from an ATM counter at Station Road near the station.
The police said nobody extended a helping hand and he remained unattended for 30 minutes.
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Later, the security personnel of the ATM called a doctor who pronounced him dead and advised the security man to take Roychowdhury's body to a hospital.
Some vendors took Roychoudhury's body to Chinsurah Imambara Hospital where doctors pronounced him brought dead.
Chief Minister Mamata Banerjee described the incident as "unfortunate" and asked whether Prime Minister Narendra Modi was taking note of it.
"Unfortunate death toll continues... This morning Kallol Roy Chowdhury collapsed and died in front of SBI ATM at Bandel station. My condolences to the bereaved family. Is Modi babu listening?" she said in a tweet.
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