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 decision is a major U.S. policy shift and comes as Biden is about to leave office and President-elect Donald Trump has pledged to limit American support for Ukraine and end the war as soon as

Russia unleashed its largest air strike on Ukraine in almost three months on Sunday, launching 120 missiles and 90 drones that killed at least seven people and caused severe damage to the power system,