Kerry urges China to end ‘business as usual’ with North Korea

But through a series of telephone conversations, US President Barack Obama and leaders from other countries that have a stake in North Korea’s nuclear programmes have agreed on the gravity of the nuclear test and reaffirmed cooperation in addressing the issue, officials of the governments said.

North Korea’s state news agency later stressed in a statement that Pyongyang will continue to build up its nuclear program as deterrence against potential aggression from the United States.

North Korea claimed on Wednesday to have carried out an underground test detonation of an H-bomb.

“China urges North Korea to adhere to denuclearization, to reiterate its commitment to this principle and to refrain from actions that can exacerbate the situation”, the Chinese Foreign Ministry’s spokesperson Hua Chunying said on Friday, adding that maintaining peace and stability in the region is China’s confirmed position.

The United States has said the Chinese approach has not worked in restrainingthe nuclear adventurism of North Korea and it was time to consider better measures.

After North Korea last tested a nuclear device in 2013, Washington sent a pair of nuclear-capable B-2 stealth bombers on a sortie over South Korea in a show of force.

Hours after the nuclear test, the U.N. Security Council said it would work immediately on significant new measures against North Korea.

Information from The Washington Post was included in this story.

(CNN)South Korea turned up the volume in its war of words with its pugnacious northern neighbor North Korea on Friday, two days after the latter claimed it had tested a hydrogen bomb.

The United Nations has already promised to tighten sanctions on Pyongyang.

“The most unsafe virus that could destroy the North Korean regime or the foundations, ideological theocratic foundations of the North Korean regime, is the truth about North Korea, truth about the outside world”, he said. South Korea responded to North Kore…

On Tuesday, North Korea announced it had successfully detonated its first hydrogen bomb.

In a hydrogen bomb, a nuclear fission explosion sets off a fusion reaction responsible for a powerful blast and radioactivity.

Hydrogen bombs use a two-step process of fission and fusion that releases substantially more energy than an atomic bomb.

Thus, the North Korea nuclear issue is merely a part of the ongoing deterioration of worldwide relations.

Despite that, North Korean defectors say South Korean music is popular in their home country, with songs and other elements of South Korea popular culture smuggled in on USB sticks and DVDs. There are still many unanswered questions about the nuclear test.

The nuclear test “represents a grave challenge to global efforts for nuclear non-proliferation”.

Japanese media said Tokyo mobilised its own reconnaissance aircraft over the Sea of Japan to try to collect atmospheric data.