A South Korean oil tanker with 24 crew members was hijacked on Sunday off the coast of Somalia, apparently by pirates, Seoul's foreign ministry said.
The 300,000-ton ship, the Samho Dream, was on its way from Iraq to the US state of Louisiana with a crew of five South Koreans and 19 Filipinos, the ministry said, according to a report by Yonhap news agency.
Officials were not immediately available for comment.
The ministry called an emergency meeting to discuss the incident, Yonhap said.
South Korea has an anti-piracy warship patrolling Somali waters because of a rise in hijackings.
Somali pirates, targeting one of the world's busiest maritime trade routes, raked in an estimated 60 million dollars in ransoms last year.