Biden lifts restriction on Ukraine's use of U.S.-provided weapons inside Russian territory

President Biden has given the OK to lift restrictions that will allow Ukraine to use U.S.-provided long-range weapons to strike deep into Russian territory, a U.S. official confirmed to CBS News on Sunday. The move is a significant change to U.S. policy in the ongoing Ukraine-Russia conflict.

The easing of restrictions would allow Kyiv to use the Army Tactical Missile System, or ATACMS, to hit targets inside Russia. The move also comes as some 10,000 North Korean troops were sent to Kursk near Ukraine's northern border to help Russian forces retake territory.

The White House National Security Council declined to comment to CBS News.