Ukraine has fired six U.S.-made ATACMS into Russia, marking the first attack using the U.S.-made long-range missiles in 1,000 days of war.

In a major policy shift, the Biden administration has authorized Ukraine to use the ballistic missiles within Russia.

Ukraine launched U.S.-made long-range missiles into Russia on Tuesday, according to Russian officials, firing the Army Tactical Missile System (ATACMS) for the first time into the Russian territory since President Biden’s administration lifted the restriction over the weekend.