Kim made her comments after White House national security adviser Jake Sullivan said the US remains concerned that North Korea would move forward with another intercontinental ballistic missile (ICBM) test after it last week fired an ICBM off its east coast.

“The United States should stop a foolish act that could put its security at risk by provoking us,” Kim was quoted saying.

She rejected US calls for unconditional talks and said the US is wrong if it believes North Korea’s disarmament was possible.

“The United States is being delusional if it believed that it could stop our advancement and achieve irreversible disarmament by temporarily halting joint military drills, deployment of strategic assets or easing of sanctions,” Kim said.

North Korea has in recent days accused American spy planes of flying over its exclusive economic zone, condemned a recent visit to South Korea by an American nuclear-powered cruise missile submarine, and vowed to take steps in reaction.