Kolkata (West Bengal): India's first underwater train project in Kolkata is almost complete. The metro will soon be operational soon, Union Railways Minister, Piyush Goyal announced.

"India's first underwater train will soon get started in Kolkata under the Hubli river. An example of impeccable engineering, this train is proof of the progress made by Indian Railways. This train will bring ease to the people of Kolkata and pride to the people of India." tweeted Piyush Goyal in Hindi.