Up to 1,000 Ukrainian soldiers are being killed or wounded each day in the Donbas region of eastern Ukraine, with 200 to 500 killed on average and many more wounded, a top Ukrainian official said on Wednesday.

President Volodymyr Zelensky said on June 1 that 60 to 100 Ukrainian troops were being killed daily as Russia stepped up its Donbas offensive. Over the past two weeks that number has climbed significantly according to David Arakhamia, who leads Ukraine’s negotiations with Russia and is one of Zelensky’s closest advisers.