"This will mean that NATO countries - the United States and European countries - are at war with Russia. And if this is the case, then, bearing in mind the change in the essence of the conflict, we will make appropriate decisions in response to the threats that will be posed to us," Putin told reporters on Thursday.
Putin's comments come as US and NATO allied partners appear increasingly open to the possibility of allowing Ukrainian forces to use Western-provided long-range weapons systems to strike at Russian military targets, something which Kyiv has openly pressed for as the war continues deep into its second year.
During a recent visit to Kyiv, US Secretary of State Antony Blinken offered the strongest suggestion yet the White House was considering lifting restrictions in line with a broader strategic shift among NATO partners.
"From day one, as you heard me say, we have adjusted and adapted as needs have changed, as the battlefield has changed, and I have no doubt that we'll continue to do that as this evolves," Blinken said, while speaking alongside Ukrainian Foreign Minister AndriiSybihaand Britain's Foreign Secretary David Lammy.
The UK's prime minister, Keir Starmer, arrived in Washington Friday for talks with US President Joe Biden that are expected to center on the use of Western weapons against targets in Russia. Before those discussions, Russia's security service, the FSB, said it had revoked the accreditation of six British diplomats in Moscow, accusing them of spying, according to Reuters.
Although the US has adjusted its policy to allow limited cross-border strikes into Russia using US-provided weapons, US President Joe Biden has yet to approve the use of longer-range systems. US officials have previously expressed concerns that allowing Ukraine to strike deep inside Russia could escalate the conflict.
Biden is facing pressure at home from lawmakers on both sides of the aisle to ease the restrictions as Ukraine struggles to consolidate battlefield advances and risks being pinned back by Russian forces.
On Tuesday, the bipartisan congressional Ukraine caucus called on Biden to allow Ukraine to strike targets inside Russia with the long-range weapons.
A group of key House Republicans also wrote to the president this week ahead of Blinken's Ukraine trip, echoing appeals from Ukrainian President Volodymyr Zelensky to lift the restrictions.
But Putin on Thursday raised doubts as to whether Kyiv could carry out long-range strikes alone, saying "the Ukrainian army is not capable of using cutting-edge high-precision long-range systems supplied by the West" without NATO assistance in targeting.
The US military already does provide intelligence to Ukraine, and has previously assisted in the targeting, although not with the long-range systems currently being considered.
According to Center for a New American Security Senior Fellow Dr. Stacie Pettyjohn, there may also be other intelligence resources available to Ukrainian forces, including commercial satellite imagery, depending on the target.
In a Thursday news conference Blinken reiterated that, as part of continuing military assistance to Ukraine, the US provides intelligence to Ukrainian forces, but declined to answer whether the US would increase its intelligence sharing.
Asked about the concerns of escalation, Blinken said Wednesday that they are one factor, but "certainly not the only factor, and it's not necessarily a dispositive factor."
He also accused Russia of escalation with its acquisition of Iranian ballistic missiles.
"We've now seen this action of Russia acquiring ballistic missiles from Iran, which will further empower their aggression in Ukraine, so if anyone is taking escalatory action, it would appear to be Mr. Putin and Russia," said Blinken.
The US first provided Ukraine with long-range Army Tactical Missile System (ATACMS) missiles, which have a maximum range of about 180 miles (290 kilometers), in October of 2023. Kyiv has long called on its Western backers to allow the use of weapons systems that would provide a longer reach inside Russian territory.
In an recent interview with CNN's Alex Marquardt, Ukrainian Defense Minister Rustem Umerov said that airfields Russia uses to hit Ukrainian cities are within the range of deep strikes. To date, Ukraine has used its existing supply of long-range ATACMS to target high-value Russian assets in occupied Crimea, including air defenses, ammo depots and airfields.
If NATO countries move forward with authorizing the use of Western weapons for long-range strikes inside Russian territory, this technology could also be used to target close-range ballistic missile (CRBM) systems that arrived in-country from Iran in recent weeks, former US ambassador William Courtney, now an adjunct senior fellow at the RAND Corporation, told CNN. With a range of just 75 miles, a US-made system like ATACMS "could hit anything at that distance and well beyond," he told CNN.
Michael Callahan, Natasha Bertrand, Oren Liebermann and Lex Harvey contributed reporting.
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