does the ukrainian military seem to think they can keep the momentum going? reporter: look. what we are seeing is a far more come complicated picture on the ground. a blackout of electricity and in donestk. two cruise missiles hit. we went with police to the wider region that have been liberated traveling to see the areas where even now investigators are beginning to look into possible war crimes. they ve been under russian occupation for six months now and taken within the first few days of the war and today watched investigators dig up some of the first vkts and possible first evidence of war crimes now retaken as a part of the offensive. this is what a man had to say about what he saw of russian troops leaving the last few days. translator: i never expected that it would be so fast. i went to the store and when i returned everyone was running away. they even drove through the cemetery. can you imagine? my wife saw how they rushed through the garden. she was worried the