North Korea is threatening to cancel the 1953 armistice that ended the fighting with South Korea, even as the U.N. Security Council prepares new sanctions against the country.
Since the two Korean nations never signed a peace treaty, they technically are still at war.
The threat is in response to the United Nation's plan to level a fourth round of sanctions against the North for its nuclear test in February. It's believed the country could have as many as 12 nuclear weapons a number that could be growing.
"They've started to enrich uranium," Joe Cirincione, with Ploughshares Fund, said. "We do have to get used to idea, that for forseeable future, we may have this persistent problem, its a low simmer (that) doesn't boil over or doesn't go away."
The United States worked closely with China, North Korea's closest ally, to draw up a draft resolution of new economic sanctions in response to North Korea's third nuclear test on Feb. 12.
"I hope to see a draft (Tuesday) perhaps, but you know, it's up to the Americans," a U.N. diplomat, speaking on condition of anonymity, told Reuters.
Kim Jong Un's regime threatened to cancel the 60-year-old Korean War cease-fire agreement by March 11, saying the latest U.S.-South Korean military drills, which began March 1, go beyond sanctions to military aggression.
Members of the U.N. Security Council say the new sanctions on Pyongyang will be the toughest ever imposed by the world body.