Two sailors who were missing are now dead , authorities say . Seven other sailors are hospitalized after toxic smoke on a submarine . The chief of the submarine has stepped down following a series of problems on vessels . In August , an explosion on another Indian submarine killed all 18 sailors on board .
Two sailors who were missing are found dead , authorities say . Seven other sailors are hospitalized after toxic smoke on a submarine . The chief of the navy has stepped down following a series of problems on vessels . In August , an explosion on another Indian submarine killed all 18 sailors on board .