Following the latest developments, Russian President Vladimir Putin updated his country's nuclear doctrine.

Afghan Voice Agency (AVA): The President of Russia confirmed the key policy of Russia in the field of nuclear deterrence on (Tuesday).
This document states: "Deterrence against a potential enemy to prevent aggression against Russia and its allies is one of the country's highest priorities."
Also, according to this document, the aggression of any country from a military alliance against Russia or its allies is considered as the aggression of the entire alliance.
 According to Sputnik, in addition, it is emphasized that the policy of the Russian government in the field of nuclear deterrence is defensive in nature.
 The document states: "Russia is conducting a nuclear deterrent against a potential enemy; Governments, blocs and alliances that consider Russia as an enemy. Also, the adaptation of nuclear deterrence to military risks and threats is included in the foundations of the policy of the Russian government in nuclear deterrence.
According to this document, aggression against Russia or its allies by a non-nuclear country with the support of a nuclear country is considered a joint attack. Also, the policy of the Russian government on nuclear deterrence is aimed at maintaining the potential of nuclear forces at a sufficient level for nuclear deterrence.
These developments, which have been approved by Putin, occur in a situation where the Kremlin announced today (Tuesday) that changes in Russia's nuclear doctrine have been prepared and will be formalized if necessary, and this shows Moscow's concern about the latest US decision regarding missile attacks from Ukraine is as deep as Russia.
 The Kremlin on Monday called US President Joe Biden's decision to allow Ukraine to fire US missiles deep into Russia reckless and warned that Moscow would retaliate.