GENEVA (AP) — A U.S. official focusing on arms control on Monday provided what he called new, declassified details of a ...

US intelligence agencies believe that China is developing a new generation of nuclear weapons and has conducted at least one ...

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

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.

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

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

This area, known as Lop Nur, or Lop Lake, is often likened by defence experts to Area 51, the fabled compound where the US tests its most classified and cutting-edge aircraft. Isolated and tightly ...

Remarks by a top administration official appeared to be aimed at dispelling skepticism of its assertions, as President Donald Trump vows to restart U.S. tests.

It remains to be seen whether the three big nuclear powers are headed into a new arms race, or whether President Trump is trying to spur negotiations on a new accord now that a last Cold War treaty ...