Russian President Vladimir Putin warned Tuesday of "serious consequences" if Western countries allowed Ukraine to use their weapons to strike Russia.
Speaking in Uzbekistan, Putin's comments came in response to calls within some NATO member states to allow Ukraine to hit targets inside Russia.
"This constant escalation can lead to serious consequences," Putin said.
"In Europe, especially in small countries, they should be aware of what they are playing with," he added.
The Russian leader said leaders should bear in mind the "small territory" and "dense population" of many European countries.
"And this factor, which they should keep in mind before they talk about striking deep into Russian territory, is a serious thing."
He said that while Ukraine would carry out the strikes, the responsibility for them would lie with Western suppliers of the weapons.
"They want a global conflict," he added.
Putin also said that while he believed Western military instructors were already in Ukraine operating undercover as mercenaries, countries such as France sending them officially would be another "escalation."
"It is another step towards a serious conflict in Europe, towards a global conflict," he said.
Ukraine's top commander announced Monday that talks were being held with France on sending military instructors to the country.
"There are specialists there under the guise of mercenaries," Putin said, adding that "this was nothing new."
He said that they would be "defeated" by the Russian army and that "we will do what we think is necessary regardless of who is on the territory of Ukraine."
"They should be aware of this," Putin said.
A Message from The Moscow Times:
Dear readers,
We are facing unprecedented challenges. Russia's Prosecutor General's Office has designated The Moscow Times as an "undesirable" organization, criminalizing our work and putting our staff at risk of prosecution. This follows our earlier unjust labeling as a "foreign agent."
These actions are direct attempts to silence independent journalism in Russia. The authorities claim our work "discredits the decisions of the Russian leadership." We see things differently: we strive to provide accurate, unbiased reporting on Russia.
We, the journalists of The Moscow Times, refuse to be silenced. But to continue our work, we need your help.
Your support, no matter how small, makes a world of difference. If you can, please support us monthly starting from just $2. It's quick to set up, and every contribution makes a significant impact.
By supporting The Moscow Times, you're defending open, independent journalism in the face of repression. Thank you for standing with us.
Remind me later.