Russian President Vladimir Putin announced Sunday that his Defense Ministry is preparing various responses should the U.S. and NATO support Ukrainian strikes deep within Russian territory using long-range Western missiles.
The 2 1/2-year Ukraine war has triggered the biggest confrontation between Russia and the West since the depths of the Cold War and Russian officials say the war is now entering its most dangerous phase.
Russia has been signaling to the United States and its allies for weeks that if they give permission to Ukraine to strike deep into Russian territory with Western-supplied missiles, then Moscow will consider it a major escalation.
Putin said on Sept. 12 that Western approval for such a step would mean "the direct involvement of NATO countries, the United States and European countries in the war in Ukraine" because NATO military infrastructure and personnel would have to be involved in the targeting and firing of the missiles.
Putin said that it was too early to say exactly how Russia would react to such a move but that Moscow would have to respond accordingly and different options were being examined.
"(The Russian Defense Ministry) is thinking about how to respond to the possible long-range strikes on Russian territory, it will offer a range of responses," Putin told Russian state TV's top Kremlin reporter, Pavel Zarubin.
With Russia advancing at the fastest rate in eastern Ukraine since the first months of the invasion, Ukrainian President Volodymyr Zelenskyy has been pleading with the West to allow Kyiv to fire deep into Russia with Western missiles.
Hitting Russia
The United States has not said publicly if it will allow Ukraine to strike Russia, but some U.S. officials are deeply skeptical that doing so would make a significant difference in the war.
Ukrainian forces already strike deep into Russia on a regular basis with long-range drones.
Russian forces have taken control of the coal mining town of Selydove in Ukraine's Donetsk region just over a week after first storming the town, according to pro-Russian war bloggers.
Putin, who ordered thousands of troops into Ukraine in 2022 after eight years of fighting in eastern Ukraine, casts the war as a battle between Russia and the declining West, which he says ignored Russia's interests after the 1991 Soviet collapse.
Ukraine and its Western allies say Putin unleashed an imperial-style war against its smaller neighbor and have repeatedly said that if Russia wins the war then autocratic countries across the world will be emboldened.
Just weeks before the U.S. presidential election, Putin changed Russia's nuclear doctrine in what the Kremlin said was an attempt to signal Russia's concern over Western discussions about missile strikes from Ukraine.
Asked if the West had heard Russia's warnings, Putin told Zarubin: "I hope they have heard. Because, of course, we will have to make some decisions for ourselves, too."
Putin said that only NATO officers would be able to fire such weapons into Russia and that they would need to use Western satellite data for targeting the weapons so the question is really "whether they will allow themselves to strike deep into Russian territory or not. That is the question."
U.S. officials say the United States is not seeking to escalate the conflict.
How a new U.S. president will approach the war is unclear: former U.S. president Donald Trump has said he will end the Ukraine war while Democratic Vice President Kamala Harris says she will continue to support Ukraine.