The European Union's foreign policy chief says North Korea's sixth nuclear test represents a "major provocation" and "a grave threat to regional and international security."
Federica Mogherini also said in a statement that Pyongyang "must abandon its nuclear, weapons of mass destruction and ballistic missile programs in a complete, verifiable and irreversible manner and immediately cease all related activities."
Mogherini said she will meet Monday with Yukiya Amano, head of the International Atomic Energy Agency, to discuss North Korea.
North Korea's nuclear test Sunday was apparently its most powerful yet. The country's state-controlled media say it was a thermonuclear device and a "perfect success."
