Russia has struck Ukraine with missiles, drones and guided bombs, killing eight people and wounding dozens of others, officials said.
Missiles also hit the capital Kiev, injuring 12 people, including two children, according to the city's mayor.
A recent spate of attacks using dozens of ultra-fast ballistic missiles has put Ukraine's air-defence system under strain.
Russia launched more than 120 drones and 12 missiles during the night, half of them ballistic, Ukrainian President Volodymyr Zelenskyy said in a post on X.
"Civilian infrastructure was hit even before the air raid alert was issued," he added.
He posted videos of emergency teams working in the smoke and rubble of ruined buildings.
Apartment buildings, offices and a theological school were damaged in Kiev, while recovery efforts were under way in other regions, he added.
A Russian "guided aerial bomb" strike on the northern city of Sumy killed five people, the city's mayor Artem Kobzar said.
One other person died in a Russian attack on the eastern town of Sloviansk, while a Russian missile strike on the southern city of Odesa killed two, authorities said.
Radar evasion
Saturday's strike on Kiev marked the second time in less than a week that missiles hit before an air alert was issued.
Sergiy Sternenko, an adviser to Ukraine's defence minister, said that impacts before the sirens could indicate Russia had used S-400 anti-aircraft missiles to carry out strikes on the ground.
"During ground attacks, these missiles are more difficult to detect by radar," he wrote on Telegram.
Russia, which denies targeting civilians, said it had struck "military-industrial facilities in Kiev and seaport infrastructure in Odesa".
On Friday, Ukrainian drones hit oil refineries in southern Russia, as Kiev targeted its foe's energy infrastructure.
