India News : Eighteen sailors were aboard the Russian-built INS Sindhurakshak when the blast struck after midnight.br br The accident soured a week of naval milestones, including the launch of a locally built aircraft carrier aimed at giving the navy heft as it competes with China in the Indian Ocean.br br Defence Minister A.K. Antony said crew members inside the diesel-electric Kilo-class submarine berthed at the main base in Mumbai had died.