Russia Foreigh Minister said the situation could slip "toward a spiral of vicious circle".

  Kim Jong-un made the missle order after the talks responding the stealth bomber flighted over the Korea penincula , state new agency KCNA said.

  The time had come to "settle acounts" with US, the KCNA quoted him as saying.

  Annual millitary drills and recent sanctions had angered Korea.

  After a late-night meeting with the army's strategic rocket forces, Kim Jong-un judged the time has come to settle acount with US, KCNA said.

  He was said to have condemned the US B-2 bomber sorted over the South Korea as a "reckless phase" that represented a ultimatum that they will ignited a nuclear war at any cost on the Korea Penincula.