Marking its entry into an elite club, India will launch its first indigenous nuclear-powered submarine at Vishakapatnam sea port for trial today.

Prime Minister Manmohan Singh will launch the submarine at the Vishakapatnam port in the presence of top Defence and Navy officials, Andhra Pradesh Chief Minister Y S Rajasekhara Reddy told reporters here today.

'The prime minister will launch the vessel. The function will also be attended by the defence minister (A.K. Antony),' a senior defence ministry official told IANS Saturday, requesting anonymity.

The submarine is currently housed in a dry dock, which will be flooded with sea water to mark the launching ceremony.