The U.N.'s nuclear chief says the world must recognize that North Korea possesses nuclear weapons and pursue dialogue despite its violations of U.N. sanctions and international law.

(Reuters) - Russian Foreign Minister Sergei Lavrov said on Thursday that Moscow viewed the notion of "denuclearising" North Korea as a "closed issue" as it understood Pyongyang's logic of relying on nuclear weapons as the foundation of its defence.

Kim Jong Un's regime has made public a second nuclear facility while its bomb-making technology is progressing according to South Korea.

Russia has declared North Korea's "denuclearization" a closed issue, affirming support for its nuclear stance against U.S. alliances.