Japanese Foreign Minister Taro Kono confirmed the test after several national geological agencies detected unusual seismic activity near the location of Pyongyang's previous tests in the country's northeast.
North Korea has developed a hydrogen bomb which can be mounted on a new intercontinental ballistic missile (ICBM), Pyongyang's state media claimed Sunday.
North Korea leader Kim Jon Un speaks with scientists in a handout picture reporting to show the development of an atomic bomb.
While this is not the first time the North has claimed to have successfully tested a hydrogen bomb, evidence suggests that this may be the real deal.
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A subsequent letter written by Deputy Attorney General Rod Rosenstein was used instead as the basis to terminate Comey. That element "is the hardest to prove, because it depends on showing an improper motive", the experts said.
North Korea is believed to have conducted a test after a magnitude 5.7 quake was detected earlier Sunday. Seoul officials revised their earlier estimate of 5.6 magnitude quake.
In Japan, Prime Minister Shinzo Abe said he "would not tolerate" another nuclear test.
Kim ordered his scientists to successfully conclude the final-stage research and development to make the state nuclear-force ideal, KCNA said. That would be 3:30 p.m.in Seoul and Tokyo, and 2:30 a.m. EDT. The report could not be independently verified.
Indicating a military option to deal with North Korea, Trump Tweeted,"The U.S. has been talking to North Korea, and paying them extortion money, for 25 years".
Experts and officials have warned that North Korea could conduct its sixth nuclear test at any time, after conducting its last two in 2016. That was revised up from an initial report of 5.6.
North Korea also boasted that all of the components of the new weapon were "homemade", thus "enabling the country to produce powerful nuclear weapons, as many as it wants", without worrying about import sanctions.
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Long-standing tension between the Rohingya Muslims and ethnic Rakhine Buddhists broke out into violent riots in 2012. Tragically, at least 26 people have so far drowned in an attempt to flee the violence.
North Korea is suspected to have carried out yet another nuclear detonation as a quake of magnitude 6.3 was detected from the test site region.
South Korea's main spy agency has previously asserted that it does not think Pyongyang now has the ability to develop miniaturized nuclear weapons that can be mounted on ballistic missiles. North Korea's recent nuclear tests have also happened exactly on the hour.
North Korea is intent on developing a nuclear-armed ballistic missile capable of reaching the continental U.S. The regime is believed to have more than a dozen nuclear weapons and is now working to miniaturize one to fit on a missile.
The announcement came hours after an artificial natural disaster with a 5.7 magnitude was detected near North Korea's nuclear site in the northeastern area.
The test came hours after the North announced it had built an advanced thermonuclear hydrogen bomb. South Korea's military said it has strengthened its monitoring and readiness while mulling a variety of possible responses that could be executed in collaboration with the U.S.
It isn't immediately clear whether North Korea has conducted its sixth nuclear test.
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Around the same time at a different location near Houston ― Clear Creek at Interstate 45 ― NWS measured 48.64 inches of rain. Almost all major watersheds in Harris County were out of banks during the peak and aftermath of Saturday night's deluge.