The bodies of two Korean and two Southeast Asian sailors who were aboard the trawler Oryong 501 were found in the western Bering Sea on Thursday.
The trawler owned by Sajo Industries and carrying 60 people sank on Monday while fishing for Alaska pollack.
Seven people were rescued and 20 bodies have now been found, including six Koreans, 12 Southeast Asians, and two unidentified bodies. Thirty-three remain missing.
A total of 11 bodies were recovered on Wednesday from the Korean trawler that sank in the western Bering Sea off Russia on Monday.
Of the 11 bodies pulled out of the sea, the Foreign Ministry said three were Korean, seven Indonesian and one Filipino. That pushes the official death toll in the disaster to 12, with 41 others still missing.
The cause of the accident is still being investigated.
The sinking of a trawler in the western Bering Sea on Monday could be recorded as the worst-ever disaster involving a Korean fishing boat. The Foreign Ministry said Tuesday that 52 people remain missing from the Oryong 501 despite an all-night search for survivors.
So far only one body has been recovered and seven crewmembers rescued.
Four Korean and Russian trawlers and a U.S. Coast Guard C-130 Hercules airplane searched the area for survivors, but only found four empty life boats that probably came from the Oryong 501.
Family members of the missing wait for news at Sajo headquarters in Busan on Tuesday. Russian rescue officials said one body was recovered wearing a life jacket, but further attempts at search and rescue were hampered by bad weather.
A spokesman for Sajo Industries, which operates the trawler, said strong winds and high waves are making it difficult just to navigate the waters.
Russia dispatched a transport aircraft and rescue vessel to the scene of the sinking, while Sajo will send six more fishing boats to assist in search and rescue operations. But chances of the crew surviving are growing extremely slim as temperatures dip to below -10 degrees Celsius.
Meanwhile, around 50 family members of the missing waited at Sajo's headquarters in the southern port city of Busan on Tuesday afternoon for any news of possible survivors. They complained that Sajo pushed the fishermen to work in rough waters aboard an aging trawler.
One sailor died and 52 went missing as a Korean trawler sank in the western Bering Sea off Russia at 2:20 p.m. on Monday.
The Ministry of Oceans and Fisheries said one Russian and six crewmembers of other nationalities had been rescued as of 6 p.m. Monday, but the fate of 52 others remains unknown as rescue efforts have been hampered by bad weather.
The Korean crewmember succumbed to hypothermia.
Of the total 60 people on board, 11 were Koreans, one Russian, 13 Filipinos, and 35 Indonesians.
/Newsis The 1,753-ton trawler was built in Spain in 1978 and Korean fisheries firm Sajo Industries bought it in 2010 and operated jointly with Russia until February this year, when the ship was registered as Korean.
It left Busan on July 10 to fish for pollack in the Bering Sea.
