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.

<i>This is a developing story. Check back soon for updates.</i>

<div class="author-bio"><p>Anders Hagstrom is a reporter with Fox News Digital covering national politics and major breaking news events. Send tips to Anders.Hagstrom@Fox.com, or on Twitter: @Hagstrom_Anders.</p></div>

President Biden approved Ukrainian President Volodymyr Zelenskyy's regime to strike targets within Russia using American long-range missiles.{ai:summary}<p>President Biden has authorized Ukraine to use U.S.-supplied long-range missiles against targets in Russia, according to reports. Russian President Vladimir Putin has warned that this escalation could be seen as an act of war, but he has not yet responded to the announcement.</p><p>The White House has not commented on the situation as it develops. #foreignaffairs</p>

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

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