Two people were killed and at least 14 wounded when a Russian drone smashed into a residential high-rise in Ukraine's Black Sea city of Odesa, authorities said on Saturday.
Three children were among the wounded in the overnight attack, with one in critical condition, said regional Governor Oleh Kiper.
Footage posted by the State Emergency Service showed firefighters battling a blaze and rushing residents down a dark stairwell in the 21-storey building.
Separately, authorities of Ukraine's southern Kherson region said one person was killed and three others were wounded in Russian strikes over the past day.
"Russian troops targeted critical and social infrastructure and residential areas in the region," Kherson's governor, Oleksandr Prokudin, said on Telegram early on Saturday.
Russia has stepped up drone and missile strikes on Ukrainian cities in recent weeks as diplomatic efforts to end the nearly three-and-a-half-year-old war have stalled.