North Korea is threatening to carry out what it calls “a new form of nuclear test.”
The foreign ministry made the statement on TV in response to condemnation from the United Nations Security Council for a ballistic missile launch it had carried out on Wednesday.
The Security Council said North Korea violated UN resolutions after launching two medium-range ballistic missiles off the east coast of the country.
A defiant North Korea said there would be more drills involving “more diversified nuclear deterrence”.
It also warned the US to watch what North Korea was doing and not to “act rashly”.