Report: N. Korea operating 3-4 more uranium sites
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North Korea has been secretly enriching uranium that could be used to build nuclear weapons at three or four undisclosed locations, a South Korean intelligence official was quoted as saying on Tuesday.
The facilities are in addition to the one at the North's main nuclear site in Yongbyon that was shown to a US expert last month and that had more than 1,000 centrifuges, which officials there reportedly said were operational. (Reuters)
