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

The Kremlin said on Wednesday that neither China nor Russia have carried out secret nuclear tests, noting Beijing had denied U.S. accusations that it had done so.

A senior US official on Tuesday revealed what he said were new details of an underground nuclear test blast that China allegedly conducted in June 2020. Assistant Secretary of State Christopher Yeaw ...

So long as it doesn't ratify the Comprehensive Nuclear Test Ban Treaty, the United States won't be able to seek short-notice, on-site inspections to deter and detect possible Chinese and Russian ...

Trump administration considers deploying additional nuclear weapons, possibly resuming underground nuclear testing following ...

Kremlin spokesperson Dmitry Peskov said neither Russia nor China had carried out nuclear tests, responding to growing international debate over ...

Speaking before the Conference on Disarmament in Geneva, Russian ambassador Gennady Gatilov decried US President Donald Trump ...

GENEVA, Feb 6 (Reuters) - The United States accused Beijing on Friday of conducting a secret nuclear test in 2020 as it called for a new, broader arms control treaty that would bring in China as well ...

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

Russia will continue to observe the limits set under the recently-expired New START nuclear arms reduction treaty if the United States does the same, Russian Foreign Minister Sergey Lavrov said ...