NEW : South Korea has seized the ship and its nine sailors . South Korea : The fishermen are suspected of fishing illegally in the Yellow Sea . Members of the South Korean coast guard board a Chinese ship to investigate . The incident triggered a swift diplomatic response , with the South Korean Foreign Ministry calling in the Chinese ambassador to South Korea to protest , the Yonhap news agency reported . North Korea says it is not involved, but China denies that claim.
NEW : South Korea has seized the ship and its nine sailors . South Korea : The fishermen are suspected of fishing illegally in the Yellow Sea . Members of the South Korean coast guard board a Chinese ship to investigate . North Korea says it is not involved, but China denies that claim.