Nuclear security

CIA Claims North Korea Boosted Nuclear Production at Secret Sites – Reports

US officials familiar with intelligence assessments were reported to have told the NBC broadcaster that Pyongyang appeared to be planning to deceive the US administration to elicit more concessions.

The report comes amid a flurry of diplomacy between the reclusive communist state and the United States, culminating in this month's historic meeting between their respective leaders in Singapore.

But the US Central Intelligence Agency, which has reportedly stepped up spying efforts in North Korea, alleges that production of weapons-grade enriched uranium has been increasing.

North Korea has only one declared enrichment facility at Yongbyon, according to NBC, but sources told the broadcaster there seemed to be more than one unreported site.