India works to refloat sub

MUMBAI: Indian divers and engineers battled on Thursday to refloat a submarine that exploded with 18 crewmen on board, as the prime minister voiced “deep regret” over the accident which is feared to have left no survivors.

The fully armed INS Sindhurakshak, returned by its original maker Russia earlier this year after a major refit, sank after it was engulfed by a fireball that lit up the night sky at a Mumbai dock early on Wednesday.