Zaporizhzhia is controlled by Ukraine but is in a region illegally annexed by Russia.
At least 17 people have been killed by Russian missile strikes on the south-eastern city of Zaporizhzhia, Ukraine’s defence ministry says.
Dozens more were wounded, and several residential buildings destroyed.
The city is under Ukrainian control, but it is part of a region that Russia says it annexed last month.
Zaporizhzhia has been hit repeatedly in recent weeks, as Russia hits back at urban areas after suffering defeats in the south and north-east of Ukraine.
Parts of the Zaporizhzhia region, including its nuclear power plant – which is around 52km (30 miles) from the city – have been under Russian control since early in the invasion.
The BBC’s Paul Adams, who was recently in the city, says the buildings struck are not obvious military targets and the attacks seem entirely indiscriminate.
More than 60 civilians are understood to have been killed in and around Zaporizhzhia in the past nine days.
Ukrainian President Zelensky called the shelling “merciless strikes on peaceful people again”.
“Absolute meanness,” he said. “Absolute evil. Savages and terrorists. From the one who gave this order to everyone who fulfilled this order. They will bear responsibility. For sure. Before the law and before people.”
The Ukrainian regional governor in Zaporizhzhia, Oleksandr Starukh, said 12 Russian missiles had partially destroyed a nine-storey building, and levelled five other residential buildings.
“There may be more people under the rubble. A rescue operation is under way at the scene. Eight people have already been rescued,” he said on Telegram.
Survivors of the strikes have spoken of the moment they were woken by the blasts.
Kateryna Ivanova and her family were forced to run to the bathroom as their apartment filled with smoke, she told AFP news agency.
After managing to run into the street to escape the devastation, Ms Ivanova says she was met by a neighbour who “screamed that her husband was dead”.
Another resident, 38-year-old Lyudmyla, told Reuters news agency how she rushed to wake up her children and move them to safety after a “roaring” blast “completely destroyed” the door to her home.
Her 10-year-old son Bohdan described the missile strike as “horrific” and said he was woken by the sound of screaming.
At the plant itself, the head of the International Atomic Energy Agency (IAEA), Rafael Grossi, said on Saturday the security situation had deteriorated further after overnight shelling the previous night cut all external power.
The plant now relies on diesel generators for the electricity it needs for reactor cooling and other essential nuclear safety, Mr Grossi said.
The IAEA is pushing for a protection zone to prevent further damage to the site. Russia and Ukraine have blamed each other for the shelling.
Meanwhile, Russian divers are beginning a fuller examination of the damage done by Saturday’s explosion on the road and rail bridge linking occupied Crimea with Russia.
Though limited traffic has resumed along one lane, a section of the bridge was brought down by the blast.
Security has been tightened and Russian President Vladimir Putin has ordered a full investigation.