Offensive operations by Russia’s army have increased across the front line, according to social media posts by Ukrainian officers, an analysis of information from the General Staff in Kyiv and soldiers speaking to CNN.

Oleksandr Syrskyi, the commander-in-chief of Ukraine’s Armed Forces, said that President Volodymyr Zelensky was right to warn of a looming Russian offensive in the Sumy and Kharkiv regions.