The assault underscored the deep mistrust between Russia and Ukraine. U.S.-mediated talks about a partial cease-fire are set to begin in Saudi Arabia later on Sunday.

Russia's overnight attack on Kyiv injured at least seven people and sparked fires in high-rise apartment buildings and throughout the city, Ukrainian officials said early on Sunday. "A massive enemy drone attack on Kyiv,

In another night attack on Ukraine, Russia used 147 drones. Of these, 97 were successfully shot down, according to Ukraine's air force. Unfortunately, debris from the drones is falling on homes and streets,