President Trump condemned North Korea as a rogue nation that can't be appeased after international reports showed the hermit kingdom successfully tested a hydrogen bomb Saturday.

"North Korea has conducted a major Nuclear Test. Their words and actions continue to be very hostile and dangerous to the United States," Trump tweeted. "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."

He added, "South Korea is finding, as I have told them, that their talk of appeasement with North Korea will not work, they only understand one thing!"

The test, which took place Saturday U.S. time, is North Korea's sixth nuclear test but its first test of a hydrogen bomb.

Tensions with Kim Jong Un's regime have been ratcheted up in recent months as the North Koreans continue to test intercontinental ballistic missiles and nuclear bombs.

Trump has tried to use a strategy of using the Chinese government to pressure the North Koreans into backing down on their weapons tests.

Last month, Trump threatened to use "fire and fury like the world has never seen" if the North Koreans made any more threats to the United States. Since then, the North has tested multiple ICBMs and, now, a thermonuclear bomb.