Ukrainian President Volodymyr Zelensky makes his first trip to the country's war-torn east since the launch of Moscow's invasion, as Russian forces tighten their grip around key cities in the Donbas region.
Zelensky's office posted a video on Telegram of him wearing a bullet-proof vest and being shown destroyed buildings in Kharkiv and its surroundings, from where Russian forces have retreated in recent weeks.
Zelensky says fired Kharkiv head of security services for 'not working on defence of city'.
