North Korea on Monday called U.S. national security adviser John Bolton a “war maniac” who is undermining global security and diplomacy after Bolton accused Pyongyang of violating international law with missile launches earlier this month.

“Our military drill neither targeted anyone nor endangered the surrounding countries, but Bolton makes dogged claims that it constitutes a violation… impudently poking his nose into other’s internal matters,” a North Korean official said in a statement carried by the state-run Korean Central News Agency (KCNA).

“It is not a mere coincidence that criticisms are now being heard in the U.S. that Bolton is a warmonger whispering war to the president when he himself evaded military service,” the statement continued. “After all, it will be fit to call Bolton not a security adviser striving for security but a security-destroying adviser who is wrecking peace and security.”

Bolton’s claim that North Korea’s missile launches violated United Nations Security Council resolutions came Friday in Tokyo, ahead of President Donald Trump’s state visit to Japan on Monday.

South Korea was quick to question Bolton’s assessment, noting that it is still analyzing the North Korean missiles in partnership with U.S. officials.