INS Sindhurakshak was "submerged at berth" and efforts were being made to enter it to reach the sailors on board, the official said.
"The submarine has submerged at her berth...only its tail is visible," an official told IANS.
He said that about 18 people were onboard the submarine at the time of the incident.
"We are trying our level best to get into the submarine," the official said.
Navy chief Admiral D.K. Joshi is on his way to the naval dockyard in Mumbai.
--IANS (Posted on 14-08-2013)