A senior official has disclosed that Up to 13,000 Ukrainian soldiers have been killed since the start of Russia’s invasion.
Mykhailo Podolyak, an adviser to Ukrainian President Volodymyr Zelensky, said between 10,000 and 13,000 troops had died.
It is rare for Ukraine to give figures for casualties, and Mr Podolyak’s comments have not been confirmed by the country’s military.
In June he said between 100 and 200 Ukrainian soldiers were dying daily.
Last month, the most senior US general, Mark Milley, said around 100,000 Russian and 100,000 Ukrainian soldiers had been killed or injured since the start of the war.