Russian strikes killed three people across Ukraine on Saturday, authorities said, while Moscow had to briefly suspend trains in its southern Rostov region after an overnight drone attack by Kyiv.

Russia now controls more than two-thirds of Ukraine’s Donetsk region — the main theater of the ground war. Russian forces have carved out a 10-mile-deep pocket around the Ukrainian troops defending the crucial city of Kostiantynivka, partly surrounding them from the east, south and west.