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​The nuclear energy agency noted the construction of a site similar to current plants, as Kim Jong-un has been pushing to produce more fuel for nuclear bombs.

By Choe Sang-Hun

Reporting from Seoul

North Korea appears to be building a new uranium-enrichment plant in its main nuclear complex, the United Nations’ nuclear watchdog warned this week, the strongest sign yet that the country’s leader, Kim Jong-un, plans to grow its nuclear weapons supply.