India, Aug. 15 -- An unidenntified man, believed to be in his late twenties, was found dead in the underground tunnel connecting Esplanade and Park Street stations of Kolkata Metro, police said on Friday.

Kolkata Metro officials said they were trying to find out how the man entered the tunnel and reached the spot where he was found without being noticed.

"Body of a man, aged between 25 to 30 years, was found near the tracks of Kolkata Metro's between Park Street and Esplanade. We have registered an unnatural death case at the New Market police station. Efforts are on to establish the identity of the man," said a senior officer of Kolkata Police.

A Kolkata Metro official said the body was spotted around 1:30 am on Friday lying next to t...