According to him, the extension of the contract was "vital."

“But it is also vital to catch up and make progress on nuclear non-proliferation and disarmament,” he said.

Earlier, the State Duma and the Federation Council ratified the agreement introduced by Russian President Vladimir Putin to extend the START Treaty until February 5, 2026.

The day before, the presidents of Russia and the United States in a telephone conversation welcomed the exchange of diplomatic notes on reaching an agreement on the extension of the START Treaty.