Five sailors remain missing as a fishing boat capsized off South Korea's southern coast on Saturday, according to Yonhap news agency.

The 29-ton vessel with nine crew members, including two South Koreans and seven Indonesians, aboard overturned in waters about 68 km south of an island in Tongyeong, South Gyeongsang province, at around 6:29 a.m. local time (2129 GMT Friday).

Rescuers have found four crew members but three of them were later confirmed dead after medical treatment while one remain unconscious.

(With input from agencies)