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.

President Joe Biden has for the first time authorized the use of U.S.-supplied long-range missiles by Ukraine to strike inside Russia.

The easing of restrictions would allow Kyiv to use the Army Tactical Missile System, or ATACMS, to hit targets inside Russia.