Awoman died after jumping in front of an approaching metro train at Girish Park station in north Kolkata on Monday afternoon, disrupting services on the North-South Line, police said.
The incident happened around 12.35 pm, they said.
The woman, who is yet to be identified, jumped in front of a Kabi Subhas-bound train, they added.
Police said they are investigating the matter, and checking the CCTV footage of the station.