An official says at least one person has died and rescuers are searching for 52 others after a South Korean fishing boat sank in the Bering Sea.

The official, from the South Korean fishing and ocean ministry, says authorities rescued seven crew members and recovered one body after Monday's sinking, but that weather and water conditions are complicating the search for the others.

The crew included 35 Indonesians, 13 Filipinos, 11 South Koreans and one Russian inspector.

The official spoke on condition of anonymity because of office rules.