North Korea may have conducted another nuclear test, South Korea says

South Korea's Joint Chiefs of Staff says a magnitude 5.6 quake in North Korea was artificial and it's analyzing whether the North conducted a nuclear test.

It says it detected a seismic wave from 12:34 p.m. to 12:36 p.m. around Punggyeri, North Korea.

The quake came just hours after North Korea claimed that its leader has inspected the loading of a hydrogen bomb into a new intercontinental ballistic missile.

SEE ALSO: North Korea says it has developed a more advanced hydrogen bomb that can be loaded onto an ICBM

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