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

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

Beijing and Moscow build their arsenals while the U.S. restrains itself.

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 ...

US intelligence agencies believe China is developing a “new generation” of nuclear weapons — with Beijing having reportedly conducted at least one undisclosed explosive test already. China’s plan to ...

President Donald Trump’s calls to ramp up nuclear weapons testing last week have put nuclear watchdogs and world leaders on alert while experts say the United States has little to gain. Photo by Yuri ...

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