NEW DELHI, Feb. 26 (Xinhua) -- At least seven Indian Navy sailors sustained injuries and two officials were missing in yet another fire mishap on board a submarine off Mumbai coast Wednesday, a senior defense official said.
"The mishap happened some 50 km off Mumbai coast when the submarine, INS Sindhuratna, was forced to surface as smoke was detected on board. The seven injured sailors have been airlifted to a naval hospital in India's financial capital," he said, on condition of anonymity.
A massive search has been undertaken to find the two missing naval officials, the official said, adding that the submarine is heading back to the shore.
Initial probe suggests that the smoke was due to a fire on board the Russian-origin Kilo Class submarine while it was being sea tested after a refit, he said.
"However, a major disaster has been averted as the vessel was not carrying any weapons or ammunition," he added.
This is the third Indian Navy submarine accident in the last seven months. In August 2013, another submarine, INS Sindhurakshak, sank at Mumbai port due to multiple explosions following a fire on board, claiming the lives of 17 sailors.