Putin is the primary decision-maker on the use of Russia's nuclear arsenal. The doctrine said any attack by a non-nuclear power supported by a nuclear power would be considered a joint attack, and that any attack by one member of a military bloc would be considered an attack by the entire alliance, it said.

Russia launched an intercontinental ballistic missile from its southern Astrakhan region during a morning attack on Ukraine, Kyiv's air force said, the first time Russia has used such a powerful, long-range missile during the war.

Russia unleashed an experimental longer-range ballistic missile on the city of Dnipro in central Ukraine on Thursday in what President Vladimir Putin called a direct response to the U.S. and British moves to bolster Kyiv’s ability to bomb targets deeper inside Russia.

The Russian president says the strike was in response to Ukraine's "use of American and British long-range weaponry".

President Vladimir Putin has said that Russia will keep testing its new Oreshnik hypersonic missile in combat and has a stock ready for use.