North Korea on Sunday threatened to conduct another nuclear test after international criticism over its firing of two ballistic missiles. The North Korean Foreign Ministry accused the UN Security Council of "provoking" Pyongyang by criticizing the missile launch and said, "We would not rule out a new form of nuclear test for bolstering up our nuclear deterrence."
The North had no comment on President Park Geun-hye's proposal on Friday of humanitarian aid and the establishment of a development bank as a step toward reunification.
In January last year, North Korea warned of an impending nuclear test following fresh UN Security Council sanctions and a month later carried out the threat.
The North also took aim at joint South Korea-U.S. military drills, accusing Washington of "madcap nuclear war exercises" and vowed to conduct war drills itself.
The ministry claimed to have "unimaginable" moves planned should the U.S. continue to provoke it.
The Foreign Ministry here in a statement warned North Korea of "consequences" should it ignore international demands and push ahead with the nuclear test.
Meanwhile, North Korea declared a no-fly zone in the East Sea for several days starting Saturday, presumably ahead of launching more missiles or rockets.
North Korea has fired dozens of rockets since the South Korea-U.S. drills began, but the UNSC took particular issue with Pyongyang's launch on March 26 of a mid-range ballistic missile, which violates previous resolutions. It is considering further sanctions.