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

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

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

WASHINGTON — The United States is ready to carry out low-yield nuclear tests to match alleged secret explosions by China and ...

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

A U.S. official revealed details of an alleged Chinese nuclear test, urging global cooperation for disarmament while ...

US claims China carried out a 2020 underground nuclear test at Lop Nur, urging Beijing and Moscow to engage in disarmament after New START expired.

CHINA has been accused of a massive nuclear expansion as well as carrying out secret tests, as the United States bids to ...

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

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

China has opposed the ‘smearing of its nuclear policy’ while insisting Beijing would not ‘engage in any nuclear arms race’ ...

WEST PALM BEACH, Fla. (AP) — New tests of the U.S. nuclear weapons system ordered up by President Donald Trump will not include nuclear explosions, Energy Secretary Chris Wright said Sunday. It was ...