The UN Security Council unanimously stepped up sanctions against North Korea on Monday over the country's sixth and most powerful nuclear test, imposing a ban on its textile exports and capping imports of crude oil.
North Korea was condemned globally for its latest nuclear test on Sept. 3, which it said was of an advanced hydrogen bomb.
The Democratic People's Republic of Korea (DPRK) is "ready to use a form of ultimate means" North Korea's ambassador to the UN, Han Tae Song said without elaborating.
US disarmament ambassador Robert Wood took the floor to say that the Security Council resolution "frankly sent a very clear and unambiguous message to the regime that the international community is tired, is no longer willing to put up with provocative behavior from this regime".