Russia has refused to reschedule a key meeting with U.S. nuclear negotiators that it canceled in November, a U.S. diplomat said on Tuesday, further delaying efforts to replace an expiring nuclear ...

After decades of progress on limiting the buildup of nuclear weapons, Russia’s war on Ukraine has prompted renewed nuclear tensions between Russia and the U.S ...

By Shaun Tandon The United States said Tuesday that Russia was not complying with New START, the last remaining arms ...

The State Department has informed Congress that Russia is no longer meeting obligations set by the only nuclear arms control ...

Russia's refusal to allow on-the-ground inspections to resume is endangering the New START nuclear treaty and U.S.-Russian arms control overall, the Biden administration charged on Tuesday.

President Vladimir Putin's defense minister Sergei Shoigu told top generals on Tuesday that Russia will continue to develop its nuclear inventory, as part of a promise to build a stronger military.

The US has previously warned Russia against using nuclear weapons in Ukraine, both through private direct communications, as well as public channels, including at last year’s UN General Assembly.

said a military defeat for Russia in Ukraine could spark a nuclear war. Kommersant Photo / Polaris While multiple countries, including the US, Germany and France, have committed in recent weeks to ...

Once again, Russia alluded to its nuclear arsenal in a bid to dissuade the U.S. and its NATO allies from helping Ukraine resist the full-scale invasion President Vladimir Putin launched almost 11 ...

Russia’s intelligence service has opened a criminal case against a US citizen suspected of “biological” espionage, officials announced Thursday. The Federal Security Service didn’t provide ...

Russia’s nuclear energy agency Rosatom has been working to supply Russia's military with raw materials for missile fuel, components and technology in a move to help it circumvent sanctions and ...

According to the Sputnik news agency, the Russian Foreign Ministry statement on Monday said that the talks between the foreign ministers of Russia and Iran were postponed after both diplomats agreed.