US adviser Sullivan warned Russia about the consequences of a nuclear strike

“We privately conveyed to the Russians at a very high level that the consequences would be catastrophic if they used nuclear weapons,” he said in an interview with NBC.

In August, Russian Defense Minister Sergei Shoigu emphasized that Russia did not use and is not going to use chemical or nuclear weapons as part of a special military operation in Ukraine.

NATO Secretary General Jens Stoltenberg said that the alliance saw no change in the readiness of Russian nuclear forces.