Ukraine hit a Russian weapons arsenal with US-made ATACMS missiles that it fired across the border for the first time, according to two US officials, in a major escalation on the 1,000th day of war. The attack comes just two days after the Biden administration gave Kyiv the green light to use the longer-range American weapons against targets inside Russia.

The Biden administration has allowed Ukraine to use Army Tactical Missiles Systems, a long-range missile system that often carries cluster bombs.

Russia's defense ministry says Ukraine launched its first attack using U.S.-made ATACMS missiles days after Biden gave Kyiv permission to fire the weapons deeper into Russia.