Japanese ship carrying 23 crew , including five South Koreans and 18 Filipinos . The captain of the vessel was killed in a fire on board as he tried to escape from the sinking. Condition of crew not immediately known ; Somalia is the world 's top piracy hotspot . S. Korea considering sending navy ships to waters off Somalia to fight piracy .
Japanese ship carrying 23 crew , including five South Koreans and 18 Filipinos . Ship carrying chemicals seized Saturday 96 miles east of Somalia 's Aden port . Condition of crew not immediately known ; Somalia is the world 's top piracy hotspot . S. Korea considering sending navy ships to waters off Somalia to fight piracy .