Seoul, South Korea (CNN) -- A South Korean coast guard commando was stabbed to death and another injured Monday after they boarded a Chinese fishing vessel they suspected of fishing illegally in the Yellow Sea, the coast guard and a South Korean news agency said Monday. 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. First Vice Foreign Minister Park Suk-hwan "strongly demanded the Chinese government strictly clamp down on illegal fishing and the illegal acts of Chinese fishermen," the news agency quoted him as saying.
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NEW: South Korea has seized the ship and its nine sailors
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South Korea: The fishermen are suspected of fishing illegally in the Yellow Sea
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Members of the South Korean coast guard board a Chinese ship to investigate
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One person on board stabs two commandos, killing one, the coast guard says
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