Three persons were rescued and one is still missing after a helicopter carrying four crashed in the East China Sea off Shanghai on Sunday.
The helicopter from China's Antarctic exploration ship, with four crew member on board, went down near the estuary of the Yangtze River at about 11:20 am (local time), official news agency Xinhua said.
"Three were rescued and rushed to hospital, the spokesman said," a spokesman for the China Marine Search and Rescue Centre, said.
"One man is in serious condition and the other two are stable," Xinhua quoted Zhang Guotong, president of the Shanghai Municipal People's Hospital, as saying.
More than 10 rescue boats are still searching for the the helicopter and missing crew member.
"The water is muddy and it is getting dark, which increase difficulties for the search," Sun Fumin, director of the East China Sea Rescue Bureau of the Ministry of Transport, said.
According to the reports, the ship-based helicopter crashed just a minute after taking off from the vessel.