North Korea claims it has a hydrogen bomb.

FOX News' Jon Decker has more from the White House:

According to North Korea's official news agency, North Korean leader Kim Jong Un says his country has developed a hydrogen bomb.

But White House spokesman Josh Earnest was quick to pour cold water on that claim...

(Earnest) "At this point the information that we have access to calls into serious question those claims."

South Korea's Defense Ministry said they, too, had no intelligence on their neighbor's hydrogen bomb claim.

A hydrogen bomb produces a much stronger blast than the atomic bombs that leveled Hiroshima and Nagasaki during World War II.

At the White House, Jon Decker, FOX News.