According to Ukrinform, Mykhailo Podolyak, an adviser to the head of the President's Office, said this on Ukraine's Channel 24.
"We have official estimates from the General Staff. There are official estimates given by the Supreme Commander-in-Chief. And they range from 10,000 to 12,500-13,000 dead. That is, we are openly talking about the number of those killed," Podolyak said.
On November 30, European Commission President Ursula von der Leyen said that "Russia's invasion of Ukraine brought death, destruction and untold suffering." According to her estimates, "more than 20,000 civilians and 100,000 Ukrainian military personnel have died to date." But later, the European Commission admitted that a mistake had been made and this information had been removed.