U.S. prepared to use force on North Korea 'if we must' - U.N. envoy

The intercontinental ballistic missile Hwasong-14 is seen in this undated photo released by North Korea's Korean Central News Agency (KCNA) in Pyongyang July 5, 2017. KCNA/via REUTERS

UNITED NATIONS (Reuters) - The United States cautioned on Wednesday it was ready to use force if need be to stop North Korea's nuclear missile programme but said it preferred global diplomatic action against Pyongyang for defying world powers by test launching a ballistic missile that could hit Alaska.

U.S. Ambassador to the United Nations Nikki Haley told a meeting of the U.N. 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.