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North Korea nuke test: What can be done to stop Kim Jong-un?

Click to play video: 'North Korea claims it can build nuclear weapons ‘at will’ after 5th nuke test'
North Korea claims it can build nuclear weapons ‘at will’ after 5th nuke test
WATCH ABOVE: North Korea claims it can build nuclear weapons ‘at will’ after 5th nuke test – Sep 9, 2016

North Korea said it conducted a “higher level” nuclear test Friday leading to swift condemnation from the United Nations, the U.S., Japan and China.

The announcement from the Kim Jong-un government marked the second time this year the North has conducted a nuclear test and raised fears the country is a step closer to developing a nuclear-armed missile that could strike North America.

“We successfully conducted a nuclear explosion test to determine the power of [the] nuclear warhead,” a news anchor announced on North Korea’s state television. “We will continue to strengthen our nuclear capabilities to protect our sovereignty. We have now standardized and minimized nuclear warheads … We can now produce small nuclear warheads any time we desire.”

READ MORE: North Korea stirs the pot with 2nd nuke test of 2016

U.S. President Barack Obama promised “serious consequences” following the nuclear test and called it “a grave threat to regional security.”

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“The United States does not, and never will, accept North Korea as a nuclear state,” Obama said in a statement. “Today’s nuclear test, a flagrant violation of multiple UN Security Council resolutions, makes clear North Korea’s disregard for international norms and standards for behaviour and demonstrates it has no interest in being a responsible member of the international community.”

WATCH: UN’s Ban Ki-moon calls North Korea nuclear test ‘brazen breach’ of Security Council resolutions

Click to play video: 'UN’s Ban Ki-moon calls North Korea nuclear test ‘brazen breach’ of Security Council resolutions'
UN’s Ban Ki-moon calls North Korea nuclear test ‘brazen breach’ of Security Council resolutions

But with the isolated country already under the toughest sanctions it has faced in decades because of a January nuclear test, some experts questioned whether North Korea has anything significant left to apply effective sanctions to.

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WATCH: Obama calls for sanctions against North Korea over missile launches

Click to play video: 'Obama calls for sanctions against North Korea over missile launches'
Obama calls for sanctions against North Korea over missile launches

Christian Leuprecht, professor of political science at Kingston’s Royal Military College and Queen’s University, says China could play a major role in deterring future tests.

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China shares a border with North Korea and is one of the last countries in the world to maintain a diplomatic relationship.

Leuprecht said cutting off oil imports are one of the last leverage points against the North.

“[Oil imports]  however come largely, or almost exclusively from and through China,” he said. “But the Chinese government has signalled already is not prepared to agree to that. Stopping oil imports would seriously destabilize North Korea, and the Chinese have decided they would rather have a nuclear armed Korea than a destabilized North Korea.”

Leuprecht said any significant actions taken by the West would have to be in cooperation with China, which appears unlikely.

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Michael Ivanovitch, president of research firm MSI Global and a former OECD senior economist, told NBC news that only the U.S., China and Russia can stop the escalation in North Korea, but their diverging interests in the peninsula make that unlikely.

“Their interests don’t coincide,” Ivanovitch said. “They were on the opposing side of the Korean War and the sequels of that conflagration are still unresolved.”

READ MORE: North Korea fires 3 medium-range missiles near Japan

An agreement between the U.S. and South Korea to deploy an anti-missile defense system, known as the Terminal High Altitude Area Defense (THAAD), in South Korea has caused tension in the region.

While the U.S. and South Korea hope to use THAAD to counter North Korea, Beijing and Moscow have viewed that idea as a regional security threat.

Leuprecht said the thorny North Korea issue has put Beijing between a “rock and hard place.”

“If [China] doesn’t agree to further sanctions, every time the North Koreans launch a missile, have a nuclear test it gives the Americans more license to build up their missile defence systems in the region, their intelligence and weapon systems in the region,” he said. “The last thing the Chinese want is a military expansion in their backyard.”
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“But at the same time [China] doesn’t want North Korea to collapse because it would create a massive migrant crisis.”

Leuprecht said an estimated five million refugees would flee North Korea alone if the country were to destabilize.

— With files from The Associated Press

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