At least 12 people were killed and more than a dozen others, including children, were wounded when Russia launched overnight missile and drone strikes across Ukraine from Friday into Saturday.
Ukrainian President Volodymyr Zelenskyy said Russia had launched 29 missiles and 480 drones, several of which targeted energy and railway infrastructure.
Authorities in Kharkiv, the second-largest city, said a ballistic missile strike destroyed a five-storey apartment block, killing 10 people.
AFP reporters saw rescuers sifting through the debris, where several people were believed to be trapped.
"Since last night, the rubble of a residential building in Kharkiv is being cleared following a Russian ballistic missile strike," Zelenskyy said on social media.
