Russian President Vladimir Putin on Tuesday lowered the threshold for a nuclear strike in response to a broader range of conventional attacks just days after the White House reportedly allowed Ukraine to fire American missiles deep into Russia.

A decree signed by the Russian leader, though long planned, came days after President Biden authorized the use of U.S.-supplied missiles by Ukraine for strikes inside Russia.

Russian President Vladimir Putin conducts an exercise of Russia's strategic nuclear deterrence forces to train actions of officials on operating nuclear weapons with practical launches of ballistic and cruise missiles,

The US sees no reason to adjust its nuclear posture in response to Russia’s decision to lower the threshold for using atomic weapons, a National Security Council spokesperson said.

President Vladimir Putin on Tuesday signed a revised nuclear doctrine declaring that a conventional attack on Russia by any nation that is supported by a nuclear power will be considered a joint

President Vladimir Putin approved an update to Russia's nuclear doctrine, widening the scenarios in which it would consider a strike. The move seemed a direct response to events in Ukraine, where the US recently allowed Kyiv to use American weapons for longer-range attacks on Russia.