Earlier in the conflict, Russia concentrated its air defense systems at the border with Ukraine and along the front line, Ukrainian military sources previously told CNN. But the increase in air strikes goes both ways. “We’ve seen all of those strikes that Ukraine conducts also mirrored in Ukraine,” Polishchuk said. Civilian death toll mountingThe escalation in the air war has led to even more civilian casualties. Last month, Moscow launched a daily average of 172 strikes on Ukraine, compared to 28 on average launched by Kyiv.