The United States has threatened to use force against North Korea to stop its nuclear missile program.

US Ambassador to the United Nations Nikki Haley told UN Security Council that North Korea 's actions were quickly closing off the possibility of a diplomatic solution and the United States was prepared to defend itself and its allies.

She also warned that Washington is prepared to cut off trade with countries trading with North Korea in violation of UN resolutions.

Meanwhile, China told the UN Security Council that military action was not an option for addressing the crisis over North Korea .

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