The head of Russia's nuclear testing site said on Tuesday his secretive facility was ready to resume nuclear tests "at any moment" if Moscow gave the order, in rare comments likely to fuel concerns that the risk of such a step is rising.

Russian nuclear test chief says Moscow is ready to resume testing 'at any moment'

A confidential U.N report said that North Korea was on track to conduct its first nuclear test since 2017. South Korea and U.S intelligence officials detected efforts by Pyongyang to prepare its Northeastern nuclear testing grounds.

North Korea: Pyongyang seen readying nuke test site

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