President Joe Biden's administration will allow Ukraine to use U.S.-provided weapons to strike deep into Russian territory, three sources familiar with the matter said, in a significant change to Washington's policy in the Ukraine-Russia conflict.
Ukraine plans to conduct its first long-range attacks in the coming days, the sources said, without revealing details due to operational security concerns.
The White House declined to comment.
The move by the United States two months before President-elect Donald Trump takes office on Jan. 20 follows months of requests by Ukrainian President Volodymyr Zelenskiy to allow Ukraine's military to use U.S. weapons to hit Russian military targets far from its border.
The change follows Russia's deployment of North Korean ground troops to supplement its own forces, a development that has caused alarm in Washington and Kyiv.
The first deep strikes are likely to be carried out using ATACMS rockets, which have a range of up to 190 miles (306 km), according to the sources.
While some U.S. officials have expressed skepticism that allowing long-range strikes will change the war's overall trajectory, the decision could help Ukraine at a moment when Russian forces are making gains and possibly put Kyiv in a better negotiating position when and if ceasefire talks happen.
It is not clear if Trump will reverse Biden's decision when he takes office. Trump has long criticized the scale of U.S. financial and military aid to Ukraine and has vowed to end the war quickly, without explaining how.
Still, some congressional Republicans have urged Biden to loosen the rules on how Ukraine can use U.S.-provided weapons.
Russia has warned that it would see a move to loosen the limits on Ukraine's use of U.S. weapons as a major escalation.
Biden had remained opposed, determined to hold the line against any escalation that he felt could draw the U.S. and other NATO members into direct conflict with Russia.
But North Korea has deployed thousands of troops to Russia to help Moscow try to claw back land in the Kursk border region that Ukraine seized this year. The introduction of North Korean troops to the conflict comes as Moscow has seen a favorable shift in momentum. Trump has signaled that he could push Ukraine to agree to give up some land seized by Russia to find an end to the conflict.
As many as 12,000 North Korean troops have been sent to Russia, according to U.S., South Korean and Ukrainian assessments. U.S. and South Korean intelligence officials say North Korea also has provided Russia with significant amounts of munitions to replenish its dwindling weapons stockpiles.
Trump, who takes office in January, spoke for months as a candidate about wanting Russia’s war in Ukraine to be over, but he mostly ducked questions about whether he wanted U.S. ally Ukraine to win.
He also repeatedly slammed the Biden administration for giving Kyiv tens of billions of dollars in aid. His election victory has Ukraine’s international backers worrying that any rushed settlement would mostly benefit Putin.
Material from the Associated Press was used in this story.