UNITED NATIONS -- North Korea has tested explosive devices and begun digging new underground tunnels at its Punggye-ri nuclear test site, which "paves the way for additional nuclear tests for the development of nuclear weapons," according to a draft U.N. report obtained by Nikkei.
N Korea at crossroads
North Korea tests explosive devices at nuclear site: U.N. report
Activity at Punggye-ri paves way for atomic weapons development, experts warn
North Korea has tested explosive devices used for nuclear testing, according to a U.N. report. © Reuters
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