Russia urged calm on Sunday as it slammed North Korea after Pyongyang said it successfully tested a hydrogen bomb.

"This latest demonstrative disregard by Pyongyang of the requirements of the relevant resolutions of the UN Security Council and the norms of international law deserves the strongest condemnation," the foreign ministry in Moscow said. "In the unfolding conditions, it is imperative to remain calm and to refrain from any actions that lead to a further escalation of tension," a statement said.  

Source: AFP