In Pictures: Indian submarine INS Sindhurakshak explodes 5 Photos . Updated: 14 Aug 2013, 04:36 PM IST Livemint At least 18 sailors are feared dead aboard the Indian submarine Sindhurakshak that caught fire after an explosion in a Mumbai dockyard, early on Wednesday. Images from the incident 1/5A man watches Indian Navy submarine INS Sindhurakshak on fire in Mumbai on 13 August. A huge explosion and fire have destroyed India’s most advanced diesel-electric submarine, which was docked at a high-security military dockyard in Mumbai. Reuters 2/5INS Sindhurakshak (in picture) is said to be one of the 10 Kilo-class submarines bought from Russia between 1986 and 2000. Armed with Russian Club-S cruise missile system, radar and electronics, the submarine was to be the backbone of the Indian Navy. Reuters 3/5A view of the flames from the burning submarine INS Sindhurakshak. The cause of the accident is not known yet. However, a Board of Inquiry is being instituted to investigate the accident. Reuters 4/5A 13 February 2006 file photo of Sindhurakshak. In May 2013, INS Sindhurakshak ran into rough weather near Egypt and was towed by the Egyptian Navy to its dockyard for repairs. Reuters 5/5Indian Navy ships at a dockyard in Mumbai. The vessel, which was fully operational with weapons on board, was half-submerged after the fire. A team of navy divers was mobilized to search for survivors. Reuters