Japan's PM agrees with Trump that cooperation is needed on North Korea

TOKYO, (Reuters) - Japanese Prime Minister Shinzo Abe on Sunday spoke with U.S. President Donald Trump by phone and said that in face of an "escalating" situation with North Korea that close cooperation between their countries and South Korea was needed.

North Korea said on Sunday it has developed a more advanced nuclear weapon that has "great destructive power" and leader Kim Jong Un inspected a hydrogen bomb that will be loaded on a new intercontinental ballistic missile.

Abe and Trump also agreed that pressure on North Korea must be raised, Abe told reporters after the conversation.

(Reporting by Elaine Lies; Editing by Bill Trott)

RELATED: Countdown to a standoff: A timeline of tension with North Korea

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Countdown to a standoff: A timeline of tension with North Korea
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Countdown to a standoff: A timeline of tension with North Korea

Jan. 6, 2016:

After four years in power, Kim Jong Un says his country can produce a hydrogen bomb, the first step toward a nuclear weapon that could target the United States. The nation tests a device, but Western experts are not convinced it is a genuine hydrogen bomb.

Feb. 7, 2016:

North Korea sends up a satellite. The United States calls this a disguised test of an engine powerful enough to launch an ICBM.

March 9, 2016:

North Korea claims it can miniaturize a nuclear device to fit onto a missile.

June 23, 2016:

North Korea says it has successfully tested an intermediate range ballistic missile (IRBM), with a range of 2,000 to 3,400 miles. Kim Jong Un claims the country can now attack "Americans in the Pacific operation theater," including the territory of Guam.

Sept. 9, 2016:

North Korea conducts its fifth and largest nuclear test on the anniversary of the country's founding. It says it has mastered the ability to mount a warhead on a ballistic missile.

April 15, 2017:

North Korea reveals a new ICBM design, displaying the missiles at a military parade to mark the birthday of founding leader Kim Il Sung. Within three months, the missiles are tested.

July 4, 2017:

North Korea tests an ICBM for the first time, saying it can launch a missile that can reach the continental United States. The missile, Hwasong-14, is tested again three weeks later, this time in a night launch.

Aug. 8, 2017:

North Korea's army threatens to fire missiles towards Guam in an "enveloping fire." The message comes hours after President Donald Trump warns Pyongyang that it will be "met with fire and fury" if North Korea does not stop threatening the United States.

Aug. 23, 2017:

North Korea publishes photographs of Kim beside a diagram of what appears to be a new ICBM. Weapons experts say it will be more powerful than the missiles tested by Pyongyang in July, and could have Washington and New York within range.

Aug 29, 2017:

North Korea fires an intermediate range missile over northern Japan, prompting warnings to residents to take cover. The missile falls into the Pacific Ocean, but sharply raises tensions in the region.

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