World War 3: China issues North Korea threat - USA MUST remove anti-missile system
Wang Yi made the comments during a meeting with Kang Kyung-wha on the sidelines of a United Nations gathering in New York on Wednesday, according to state news agency Xinhua.
South Korea and the US say the high-tech missile-defence system called Terminal High Altitude Area Defense (THAAD) is needed to defend against the threat of North Korea.
But China claims it will do nothing to reduce tension and its powerful radar system threatens the country's security.
China's call for the removal of the system comes after South Korea pressed the US for additional deployment of four THAAD launching pads.