In a telephonic conversation with his Russian counterpart Vladimir Putin, US President Joe Biden stressed several times the inadmissibility of starting a nuclear war, Russian presidential aide Yuri Ushakov told reporters.

"It is very important that President Biden stressed several times during the conversation that it is impossible to start a nuclear war, nor to win it," Ushakov noted.

According to Putin's aide, "Biden also stressed that Russia and the United States can and should play a key role in efforts to ensure peace and security, both in Europe and elsewhere in the world."

As per Ushakov, Biden assured Putin that Washington does not intend to deploy assault weapons in Ukraine.

"The main point of the American side during this conversation is that President Biden has made it clear that the United States does not intend to deploy assault weapons in Ukraine," Ushakov said. "Vladimir Putin noted that this is one of the key points included in our documents, which we have handed to the Americans and around which we want to hold further substantive talks."