China must decide on further action against North Korea - U.S. ambassador to U.N.

U.S. Ambassador to the United Nations Nikki Haley directs comments to the Russian delegation at the conclusion of a U.N. Security Council meeting to discuss the recent ballistic missile launch by North Korea at U.N. headquarters in New York. REUTERS/Mike Segar

NEW YORK (Reuters) - The United States is "done talking about North Korea" and China must decide if it is willing to back imposing stronger United Nations sanctions on North Korea over its two long-range missile tests this month, U.S. Ambassador to the United Nations Nikki Haley said on Sunday.

Haley said in a statement that any new U.N. Security Council resolution "that does not significantly increase the international pressure on North Korea is of no value." The United States flew two supersonic B-1B bombers as a show of force after Pyongyang fired a second intercontinental ballistic missile (ICBM) on Friday.