A lighter vessel, with 12 crew members onboard, has capsised in Bay of Bengal, near Sangu gasfield in Chattogram.
Heraparbat 8, the vessel, was transporting 1,100 tonne of coal from the port city to Dhaka, when it capsized around 8am Thursday, Ataul Kabir, joint secretary of Water Transport Cell (WTC), said.
It sank 20km off the Karnaphuli estuary.
WTC coordinates the movement of individually owned lighter vessels in Chittagong and nearby areas.
Bangladesh Navy has rescued 10 crew members so far, said Nabi Alam, general secretary of Bangladesh Lighterage Workers Union. The work for rescuing the rest of the crew is ongoing, Nabi added.
He said the vessel capsised due to the strong currents in the sea because of the rough weather.