Vice President Pence early Monday warned North Korea not to test President Trump or the U.S. military.

"Just in the past two weeks, the world witnessed the strength and resolve of our new president in actions taken in Syria and Afghanistan," the vice president said during a joint appearance with South Korea's acting president, Hwang Kyo-ahn.

"North Korea would do well not to test his resolve — or the strength of the armed forces of the United States in this region."

Pence's comments come just days after a failed North Korean ballistic missile test. A U.S. official said the missile "blew up almost immediately" after its launch, adding that the type of missile is still being assessed.

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One day before the test, North Korea held a military parade, showing off its largest missiles amid increased tensions in the region over its nuclear program.

During his appearance in South Korea, Pence also said previous administrations have practiced "strategic patience" in the region and vowed that the "era of strategic patience is over."