Biden authorizes Ukraine to use US long-range missiles to strike inside Russia: report

President Biden approved Ukraine's military to use U.S.-provided long-range missiles on targets inside Russian territory, the New York Times reported Sunday, citing unnamed U.S. officials.

Russian President Vladimir Putin has previously said that such an escalation would constitute an act of war. He has yet to react to Biden's announcement Sunday.

The White House did not immediately respond to a request for comment from Fox News Digital.

Biden's announcement came just hours after Russia concluded one of its largest missile and drone attacks in months, launching over 200 targeting Ukraine's power and energy infrastructure.

Putin has previously said that giving Ukraine the green light on missile use would effectly mean that the U.S. and NATO are "in the war."

"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 in September.

"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," he added.

This is a developing story. Check back soon for updates.