(FoxNews.com) - Amid new North Korean threats to test a hydrogen bomb in the Pacific Ocean, President Trump tweeted Friday that the rogue regime's leader would be "tested like never before."
Trump, during a speech at the United Nations General Assembly earlier this week, warned the U.S. would "totally destroy" North Korea if Pyongyang continued its provocative actions, leading North Korean leader Kim Jong Un to up the ante by calling Trump "deranged." North Korea escalated the situation further when the nation's foreign minister revealed Pyongyang could conduct the H-bomb test, and, between tweets about healthcare and "The Russia hoax," Trump fired back.
"Kim Jong Un of North Korea, who is obviously a madman who doesn't mind starving or killing his people, will be tested like never before!" Trump wrote.
The Yonhap news agency reported Thursday on the hydrogen bomb threat from North Korean Foreign Minister Ri Yong Ho on the sidelines of the United Nations General Assembly in New York. Ri framed the possible new nuke test as a response to Trump's U.N. speech.
"This could probably mean the strongest hydrogen bomb test over the Pacific Ocean. Regarding which measures to take, I don't really know since it is what Kim Jong Un does," Ri said.
Such a test would be considered a major provocation by the U.S., South Korea and Japan. Ri was scheduled to address the U.N. General Assembly on Saturday, a day later than previously scheduled.
Ri's comments followed Kim's extraordinary statement lashing out at Trump, vowing the American leader would "pay dearly" for his threat to destroy North Korea.
Kim's first-person statement was published by North Korea's state propaganda arm in response to Trump's fiery speech at the U.N. General Assembly on Tuesday. South Korean media called it the first such direct address to the world by Kim.
Kim said Trump was "unfit to hold the prerogative of supreme command of a country." He also described the U.S. president as "a rogue and a gangster fond of playing with fire."
Some analysts saw Kim's statement as a clear announcement that North Korea would ramp up its already brisk pace of weapons testing, which has included missiles meant to target U.S. forces throughout Asia and the U.S. mainland.
On Tuesday, Trump mocked Kim as a "rocket man" on a "suicide mission," and said that if "forced to defend itself or its allies, we will have no choice but to totally destroy North Korea."
Kim characterized Trump's speech to the world body as "mentally deranged behavior."
He said Trump's remarks "have convinced me, rather than frightening or stopping me, that the path I chose is correct and that it is the one I have to follow to the last."
Kim said he was "thinking hard" about his response and that Trump "will face results beyond his expectation."
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The Associated Press contributed to this report.