North Korea's pursuit of nuclear weapons and ballistic missiles and "pattern of provocations" are a serious threat to Asian and world security, US Secretary of State Hillary Clinton has said.
North Korea released a statement at the Association of Southeast Asian Nations' annual conference in Cambodia saying Washington's "never-ending nuclear threat" against the North has forced Pyongyang to build atomic weapons.
Animosity runs high after a North Korean rocket launch in April that Washington and Seoul called a cover for a banned long-range missile test. North Korea said it was a satellite launch attempt.
Mrs Clinton said Pyongyang's new leadership should focus on its people's "needs and aspirations" so it did not "fall further behind".
The North's statement says its nuclear programme is a deterrent that reduces the risk of war.