Russian missile attacks hit critical infrastructure in Kyiv and the eastern city of Kharkiv on Saturday morning, officials said, and the governor of another region warned that a massive missile strike could follow in the coming hours. Reuters journalists heard a series of blasts in Kyiv before the air raid siren even sounded, which is highly unusual. Officials told residents to stay in shelters. “Explosions in Dniprovskiy district. All agencies heading to the site. Stay in your shelters!” Kyiv Mayor Vitali Klitschko wrote on the Telegram messaging app.