Zelensky said the situation in Donbas, where the fiercest fighting is taking place, is 'very difficult' but insisted his soldiers are 'holding our defensive perimeter' despite advances by Putin's men in recent days. Ukraine is losing up to 600 troops per day including 100 killed in action, President Zelensky has admitted as he gave the clearest indication yet of the blood-debt his military is paying to hold back the Russian invasion.