NEW DELHI (AP) - An Indian navy submarine has caught fire after an explosion and sank at a port in Mumbai.
    
Navy spokesman Narendra Vispute said efforts were being made to ascertain the safety of about 18 navy personnel on the diesel-powered submarine.
    
It submerged at its berth in the naval dockyard early Wednesday with only a portion visible above the surface.
    
He said an explosion on the submarine caused a major fire. The cause is being investigated.
    
Indian media reports say the 16-year-old Russian-made submarine, INS Sindhurakshak, had recently returned from Russia after undergoing an overhaul and upgrade.

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