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 ...

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

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

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

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

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

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