INS Sindhurakshak recently underwent a mid-life upgrade in Russia.

On the TV Times Now channel Wednesday, Indian experts said an explosion on the deck of the Iranian submarine INS Sindhurakshak on Tuesday night was caused by a technical problem, specifically in the process of battery charging. However, the investigation committee has not yet released any official conclusion and said that a plot on the occasion of Indian Independence Day was possible. The submarine sank after a fire broke out on its deck at a Mumbai ship building and repair facility. A series of explosions thought to be torpedo explosions completely destroyed the submarine. 15 sailors and 3 commanders trapped inside the submarine. The Indian navy has lost its most advanced submarine.