A U.S. official focusing on arms control has provided what he called new, declassified details of a Chinese underground ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one covert explosive test in recent years as part of a broader push to ...

Satellite imagery of secretive nuclear facilities reveals Beijing’s efforts to expand its arsenal, just as the last global ...

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

The United States accused China of rapidly expanding its nuclear arsenal and called for Beijing to be included in any future ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald ...

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

The United States had held "preparatory" meetings with Russia and with China in Washington after the New START treaty lapsed earlier this month and the meetings in Geneva were "a little bit more ...

Washington on Monday accused China of dramatically swelling its nuclear arsenal, and doubled down on claims that Beijing has ...

The US accused China of secret nuclear tests, banned under international agreement, that were building toward tests of larger nuclear warheads.

The report will likely spark fears the world could inch closer to a new conflict, with CNN reporting sources who said China also appears to be developing low-yield, tactical nuclear weapons for the ...

US officials reportedly believe China’s nuclear expansion is narrowing the gap with the United States and Russia, potentially ...