Russian forces withdraw from the Kharkiv region as Ukraine pushes a counteroffensive

Ukrainian forces have broken through Russia's front lines in the east, retaking strategic towns and territory in a surprise counteroffensive that began just days ago.

Ukrainian officials claim to have recaptured some 270 square miles and the key towns of Izium, Balakliya and Kupiansk — all of which have been controlled by Russian forces for months.

In a video posted to Telegram, Oleh Syniehubov, head of Kharkiv regional military administration, records from Balakliya, showing the Ukrainian flag raised behind him. It is one of multiple social media posts purportedly of...