President Trump early Sunday characterized North Korea's actions as "hostile and dangerous to the United States" after Pyongyang's latest test of a nuclear weapon.
"North Korea has conducted a major Nuclear Test," he tweeted.
"Their words and actions continue to be very hostile and dangerous to the United States," he added.
"North Korea is a rogue nation which has become a great threat and embarrassment to China, which is trying to help but with little success."
North Korean state television earlier in the day described a test of a miniaturized hydrogen bomb capable of fitting on an intercontinental ballistic missile (ICBM) as a "perfect success" and a "meaningful" step forward.
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