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

A U.S. official revealed new allegations regarding a Chinese nuclear test and called for international pressure on China and ...

A Trump administration official said that a remote seismic station in Kazakhstan measured an “explosion” in western China on ...

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 ...

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

A US official has presented evidence of a secret Chinese nuclear test, raising tensions in global arms control discussions.

Officials have ruled out earthquakes or mining as the source of a 2.75-magnitude event in 2020 near China's nuclear test site.

U.S. releases seismic data alleging a secret 2020 Chinese nuclear test at Lop Nur as global arms control agreements continue ...

State Department alleges China conducted nuclear test in 2020, reigniting debate over U.S. testing moratorium and ...

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

At a event in Washington D.C., A U.S. official said a remote earthquake in 2020 was caused by a Chinese nuclear test.