" The cause of ignition is, however, yet to be established. Forensic examination would throw more light into the possible cause of ignition," says Antony.
He said this would be possible only after the "partially submerged" submarine is afloat and dewatered.
After the accident, the Navy has ordered an audit of Standard Operating Procedures (SOPs) on all operational submarines and extensive checks on the weapon-related safety systems.
The explosion and resultant damage were near instantaneous, and the 18 personnel could not evacuate, says the Defence Minister.
