According to US experts, Ukrainian soldiers have regained more territory in five days than Russian troops have occupied since April. "The liberation of Izyum will be Ukraine's greatest military success since the victory in the Battle of Kyiv in March," said the Institute for the Study of the War (ISW) in its analysis of the situation on Sunday. As a result, Russia's planned advance on the Donbass from the north failed, the experts said. Isjum is likely to be taken within 48 hours if it has not already happened.

Since the beginning of the war, the think tank in Washington has regularly published analyzes of the fighting in Ukraine. Sunday is the 200th day of the Russian war of aggression.

Meanwhile, after the rapid advance of the Ukrainian military in the north-east of the country, not all Russian troops managed to retreat, according to information from Kyiv. "In the Kharkiv area, enemy units from the 3rd Motorized Rifle Division of the 20th Army are cut off from the supply routes and are in a panic," the Ukrainian general staff said in its situation report on Sunday. In addition, the losses on the Russian side were high, with 400 dead in one day. The information has not been independently verified.

The General Staff did not disclose details of positions and the extent of the recent recaptures. According to earlier reports, Russian troops occupied around 125,000 square kilometers in Ukraine. That is one-fifth of the country's territory, including the Crimean Peninsula.