WASHINGTON—President Biden has for the first time authorized Ukrainian forces to use Western-made long-range weapons to strike inside Russia, allowing Kyiv to better defend itself against Russia, according to U.

The Biden administration will allow Kyiv “limited” use of the ATACMS long-range missile system to strike enemy positions in Kursk, a significant reversal of U.S. policy.

With two months left in office, the president for the first time authorized the Ukrainian military to use the system known as ATACMS to help defend its forces in the Kursk region of Russia.