Most of Oleksii’s patients are Ukrainian soldiers, but he also treats local civilians and “several Russian prisoners of war”.
He said one Russian patient stood out in his memory: “He was telling me how much he loved Ukraine and how he was forced to come and fight us.”.
The lead surgeon Dr Oleksii said: “We are fighting a battle with death every day.
The Sun joined surgeons in a cellar as they performed life-saving operations while massive Russian airstrikes thundered through the night outside.
He said he treated Russians “through gritted teeth” as there is growing evidence that it is a Russian policy to execute Ukrainians if they surrender on the battlefield.