But hours after the statement was published on Friday Foreign Minister Ri Yong-ho spoke to reporters in NY and raised the possibility of a further, more high-stakes nuclear test.
Ri was speaking to reporters about a statement by the North Korean leader released early Friday morning saying Pyongyang will take the "highest level of hard-line countermeasure in history" to retaliate for recent remarks by U.S. President Donald Trump. Such a test would be considered a major provocation by Washington and its allies.
"We can't have mad men out there shooting rockets all over the place", he added.
Earthquake Detected in North Korea; China Suspects Nuclear Test
Trump warned that the USA will "totally destroy" North Korea, and Kim threatened to "tame the mentally-deranged dotard with fire". Senator John McCain said he opposes the latest plan to replace President Barack Obama's healthcare law.
Experts say Trump's speech could have an opposite effect, intensifying the deteriorating situation in the Korean peninsula.
"This may be the most powerful detonation of a bomb in the Pacific ocean", said he.
Earlier this month, North Korea conducted its sixth and most powerful nuclear test to date and it was subsequently slapped with fresh, tough United Nations sanctions. Trump has repeatedly said he will not hesitate to destroy North Korea if it attacks the U.S.
North Korea's foreign minister also raised the level of tension.
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Cavar said most of his time in the cave was spent trying to sleep, talking to himself and hunting for water. A 19-year-old Indiana University freshman is recovering after he was abandoned in a cave for three days.
He said: "There's a certain amount of bluster that's taken for granted when you're dealing with North Korea".
Kim issued a blistering response to Trump's United Nations speech, calling him "the mentally deranged US dotard" and referring to Trump as a "gangster fond of playing with fire, rather than a politician".
Although it is far from clear what the North will do, Chung said it was possible the North could try to test an H-bomb over the northern Pacific.
They vowed to keep the top-level momentum going with a successful hosting of Trump's visit to South Korea in November.
China limits oil trade to North Korea and bans textile trade
The ban on textiles - Pyongyang's second-biggest export - is expected to cost the country more than $700m (£530m) a year. Kim responded in a statement, calling Trump a "mentally deranged USA dotard" and said "a frightened dog barks louder".