A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground nuclear test nearly six years ago.

MOSCOW, Feb 24 (Reuters) - Russia accused Ukraine on Tuesday of trying to obtain a nuclear weapon with help from Britain and ...

President Trump is pressuring Iran to either curtail its nuclear program or face military strikes, after Iran amassed a large ...

All three of the plants in which Iran is known to have produced enriched uranium, which can be used as fuel for power plants and nuclear bombs depending on its purity.

Russia's Foreign Intelligence Service has accused Britain of 'preparing' to arm Ukraine with a nuclear bomb because 'British elites are not prepared to accept defeat' ...

Special envoy Steve Witkoff says Iran is a “week away” from developing nuclear bombmaking material through uranium enrichment. Witkoff said Iran’s enrichment level has reached “60 percent.” “They’re ...

A US official says a seismic station in Kazakhstan collected evidence of an alleged China nuclear test at Lop Nur in June 2020.

Russia has marked the fourth anniversary of its full-scale invasion of Ukraine by claiming the UK and France are plotting a ...

The allegations were leveled by U.S. officials late last week. Arms control experts worry that norms against nuclear testing are unraveling.

The US-based Institute for the Study of War said in a report that the Kremlin is looking for ways to divert attention away ...

US official Christopher Yeaw said 'Beijing is on track to have the fissile material necessary for more than 1,000 nuclear ...

Russia has accused Britain and France of preparing to arm Ukraine with a nuclear bomb, as per the country's intelligence ...