A man stands inside a crater left by a Russian missile, amid Russia's attack on Ukraine, in the village of Kopyliv, Kyiv region, Ukraine January 14, 2023. REUTERS/Valentyn Ogirenk 

KYIV, Jan 14 (Reuters) - Russian missile attacks hit critical infrastructure in Kyiv and the eastern city of Kharkiv on Saturday morning, 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. No one was reported hurt, but missile debris caused a fire in one place and houses were damaged outside the capital, officials said

 Men stand next to a crater left by a Russian missile, amid Russia's attack on Ukraine, in the village of Kopyliv, Kyiv region, Ukraine January 14, 2023. REUTERS/Valentyn Ogirenko