印度全力搜查沉没潜艇下落
Indian divers are struggling to search a submarine which sank after it exploded in a Mumbai dockyard with 18 sailors feared dead inside.
印度潜水员正在全力搜查一艘潜艇下落，该潜艇停靠于孟买一处船坞，随后发生爆炸饼沉没，艇内18名水手性命堪忧。
Rescuers are yet to reach any of the crew who were on board when two huge explosions led to a devastating fire early on Wednesday.
Officials say they have been hampered by poor visibility, restricted space and equipment displaced by the blasts.
The divers are also working to bring the vessel back to surface.
India's navy chief has warned the country to "prepare for the worst".
It is not clear what caused the blasts on the diesel and electricity-powered INS Sindhurakshak. An inquiry is under way and sabotage（破坏，怠工） has not been ruled out, although officials say that looks unlikely at this stage.
Officials say divers aboard the submarine are working around the clock in difficult conditions.
The vessel is filled with sea-water and the heat of the explosion also melted parts of the internal hull, deforming the submarine hatches and preventing access to compartments.
Heavy duty pumps are being used to pump out water in order to help refloat the vessel.
'Deeply pained'
As India marked Independence Day, Indian Prime Minister Manmohan Singh expressed sorrow: "We are deeply pained that we lost the submarine INS Sindurakshak in an accident yesterday. Eighteen brave sailors are feared to have lost their lives," he said.
The prime minister said it was all the more painful considering the navy's recent successes in launching a home-built submarine and acquiring a nuclear submarine.
Correspondents say that India has steadily developed its naval capabilities in recent years, motivated by its rivalry with neighbouring China, but not without setbacks.
Two huge explosions took place on board the INS Sindhurakshak after midnight on Tuesday. Firefighters spent four hours putting out the ensuing blaze.
Dramatic images on Indian television showed a large fireball illuminating the sky. Smoke from the blaze could be seen in many parts of the city. Many sailors managed to jump to safety after the blast and some were taken to hospital.
The Russian-built vessel had recently been upgraded at a cost of $80m (£52m) and it may have been armed with missiles and torpedoes.
Russian firm Zvyozdochka, which refitted the submarine, said the vessel had been fully operational when it was returned to India in January.
On Wednesday Indian Defence Minister AK Antony visited the site. Describing the events as a "shocking tragedy", he offered his condolences to relatives of those who may have perished.