“We condemn this irresponsible step and violation of agreements that are in existence,” Vladimir Voronkov told RIA Novosti.
He said that a meeting behind closed doors would be held at 10:00 GMT on Wednesday by the Nuclear Test Ban Treaty organization members to reveal the details of the testing. He said that the UN Security Council will also convene soon to review the political repercussions of the prohibited nuclear testing.
Earlier on Wednesday, an earthquake occurred in South Korea, prompting Seoul's suspicions that Pyongyang had performed a nuclear test. North Korea subsequently confirmed that it had successfully tested a hydrogen bomb.
Voronkov said that it is so far unclear whether North Korea tested a nuclear bomb or a thermonuclear bomb.
