President Volodymyr Zelensky on Sunday confirmed Ukrainian troops had recaptured the strategic city of Izyum in the east of the country from Russian forces as part of a large-scale counter-offensive, reported AFP.

In an address to the nation marking 200 days since the beginning of Russia's military operation, Zelensky thanked Ukrainian forces who "liberated hundreds of our cities and villages ... and most recently Balakliya, Izyum and Kupiansk," naming three important hubs recently captured by Kyiv's army.

The head of the Ukrainian military announced early Sunday that as much as 3,000 square kilometers had been wrested from Russia since the offensive began at the beginning of this month.

Military observers have said the confirmed recapture by Ukraine of Izyum would represent a serious blow to Moscow's military ambitions in east Ukraine.