(ATTN: UPDATES with background from para 6)
WASHINGTON, Sept. 3 (Yonhap) -- U.S. President Donald Trump said Sunday that talk of "appeasement" with North Korea will not work, after the communist country carried out its sixth nuclear test.
In a series of tweets, Trump said the latest test that came earlier in the day proved the North continues to be dangerous to the U.S., threatens and embarrasses China, and that South Korea's efforts to engage with Pyongyang are fruitless.
"North Korea has conducted a major Nuclear Test," he said. "Their words and actions continue to be very hostile and dangerous to the United States."
Trump then 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."
Indicating a policy rift with Seoul, he went on to say, "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 first reaction out of Washington came about eight hours after tremors were detected near the North's main nuclear test site in northeastern Punggye-ri. Pyongyang announced afterward that it had successfully tested an H-bomb for its intercontinental ballistic missiles.
The provocation sharply escalated tensions that were already at a new high following Pyongyang's two ICBM tests in July.
Last week, it tested an intermediate-range ballistic missile over Japanese territory in what analysts said was a demonstration of its capability to strike the U.S. island of Guam in the western Pacific.
North Korea had earlier threatened to lob missiles toward the island, following Trump's threat to unleash "fire and fury" on the regime.