Putin's use of nuclear weapons is the biggest threat since Cuban Missile Crisis - Biden

US President Joe Biden has said that Russia's use of nuclear weapons is the biggest threat since the Cuban Missile Crisis, due to internal divisions within the country.

Reuters report.

"US President Joe Biden said that Russian President Vladimir Putin's threat to use nuclear weapons is the biggest threat since the Cuban Missile Crisis, as Russian military leadership faced a rare backlash from the domestic public over the war in Ukraine," the report said.

Biden emphasized that the president of Russia "is not joking when he talks about the potential use of tactical nuclear weapons, biological or chemical weapons, because its armed forces will lose significantly."

"For the first time since the Cuban Missile Crisis, we have a direct threat of nuclear weapons if things actually go the way they're going. We haven't faced the prospect of Armageddon since Kennedy and the Cuban Missile Crisis," Biden said.

During the 1962 crisis, the United States under President John F. Kennedy and the Soviet Union under Nikita Khrushchev came close to using nuclear weapons because of Soviet missiles in Cuba.

"I don't think there is such a thing as the ability to easily (use, - ed.) tactical nuclear weapons and not end up with Armageddon," Biden said.