Amid new tension between the two countries, Secretary of State Mike Pompeo said Friday that the U.S. expects North Korean leader Kim Jong Un to live up to his promise to President Donald Trump to continue his moratorium on missile launches and nuclear tests.

"In Hanoi, on multiple occasions, he spoke directly to the president and made a commitment that he would not resume nuclear testing nor would he resume missile testing," Pompeo said. "So that's Chairman Kim's word. We have every expectation he will live up to that commitment."

A senior North Korean official said earlier Friday in Pyongyang that Kim will soon decide if he wants to continue diplomatic talks and refrain from doing missile launches and nuclear tests.

Vice Foreign Minister Choe Son Hui also alleged that Pompeo and Trump's national security adviser, John Bolton, created an atmosphere of hostility and mistrust at last month's nuclear summit in Hanoi, Vietnam. She suggested that while Trump was more willing to talk, Pompeo and Bolton expressed uncompromising demands of the North Koreans.

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