In yet another accident involving the Navy, one civilian worker was killed and two injured in an accident at the under-construction nuclear submarine at the shipbuilding centre of Eastern Naval Command at Vishakhapatnam last night.

Defence Research Development Organization, DRDO chief Avinash Chander said an inquiry has been ordered but maintained that there is no setback to the programme for development of Arihant class submarines.

AIR corresponent reports, the incident occurred when the engineers were conducting a routine hydro pressure test at the Ship Building Centre . The cause of the accident is believed to be due to high pressure in the cylinders. An enquiry has been initiated .The two injured have been admitted to the Naval hospital while the body of the deceased has been sent to Government King George Hospital.

Yesterday's incident came a day after leakage of a deadly gas in an under-construction warship in Mumbai's Mazagon dock, which claimed the life of a Navy Commander. This is the 12th incident involving naval assets in the recent past. Around 10 days ago, warship INS Sindhuratna had suffered a mishap under water when smoke and fire killed two officers and the incident led to the exit of former Navy Chief Admiral DK Joshi who resigned taking moral responsibility.

Under the Arihant class submarine development programme, India is building three submarines. The first vessel of the class INS Arihant is expected to be launched for sea trials within a month or two which are expected to be completed within this year.