Kyiv's forces reportedly used the missile system to target military facilities in Russia's Bryansk region on November 19.

The Ukrainians] are authorized to use ATACMS for self-defense when there is an immediate necessity, and clearly, that is happening in and around Kursk,” Kirby said. “We have adjusted the guidelines and instructed them that they can use [ATACMS missiles] to strike these types of targets.

John Kirby, National Security Council Coordinator for Strategic Communications at the White House, confirmed during a briefing on Monday, 25 November, that Ukraine had received authorisation to launch long-range ATACMS missiles on targets in Russia.