Ukrainian President Volodymyr Zelenskyy said Russian forces have begun their new offensive against cities in the east and south and that a "substantial part" of the Russian army is taking part.
The Russians are pulling some troops away from Ukraine's capital Kyiv. But what exactly does this mean? U.S. and Ukrainian officials suspect Moscow may just be pausing before another big offensive.
The Donbas region, the site of two breakaway republics created by Russia-backed separatists in 2014, has become the site of some of the heaviest fighting in recent days, a senior U.S. official says.
