WASHINGTON North Korea might have attempted to test components of a hydrogen bomb on Jan. 6, CNN reported on Thursday, citing an unnamed U.S. official.
North Korea tested a nuclear device on Jan. 6 that it said was a hydrogen bomb.
U.S. State Department spokesman Mark Toner told reporters earlier on Thursday that the United States still believes that Pyongyang did not test a hydrogen bomb.
(This version of the story corrects to show components possibly tested on January 6)
(Reporting by Eric Beech)
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