Putin says NATO will be "in the war" if U.S. or allies let Ukraine fire long-range missiles at Russia

Russian President Vladimir Putin warned Thursday that a decision by the U.S. or its NATO allies to allow Ukraine to use Western-supplied long-range missiles to hit targets deep inside Russia would be viewed as NATO's direct participation in the war, which he said would significantly change "the very nature of the conflict."

"Flight assignments for these missile systems can, in fact, only be entered by military personnel from NATO countries. Ukrainian servicemen cannot do this. And therefore, it is not a question of allowing the Ukrainian regime to strike Russia with these weapons or not. It is a question of making a decision whether NATO countries directly participate in the military conflict or not," Putin said in response to a question on Thursday.

"If this decision is made, it will mean nothing less than the direct participation of NATO countries, the United States, and European countries, in the war in Ukraine," the Russian leader added.