Twenty-seven people have been killed and 25 injured when Ukrainian forces shelled the Russian-controlled city of Donetsk in eastern Ukraine, the Russian-appointed head of the Donetsk region says.
According to Alexei Kulemzin, the city's Russian-installed mayor, Ukrainian forces bombarded a busy area where shops and a market are located.
Donetsk chief Denis Pushilin said the city was shelled by Ukrainian artillery.
Reuters photographs and video taken at the scene showed crying people, some of whom said they had lost relatives, and bodies lying on blood-soaked snow near one of the city's markets.
Pushilin announced a day of mourning on Monday in the Donetsk People's Republic, the name given to the part of the region Russia says it has annexed.
In his nightly video address, Ukrainian President Volodymyr Zelenskiy did not address the attack but said that in a single day, Russia had shelled more than 100 cities, towns and villages in nine regions in Ukraine, and that the attacks in Donetsk region had been "particularly severe".
Ukraine's forces in the Tavria, or southern zone, said in a Facebook post that soldiers under its command were not responsible.
"Donetsk is Ukraine!" it said. "Russia will have to answer for taking lives of Ukrainians."
Pushilin said 18 of the injured were hospitalised and seven being treated as outpatients.
In Moscow, the Russian foreign ministry called the attack "a barbaric act of terrorism" by Ukraine that was carried out "with the use of weapons supplied by the West".
"The Russian side categorically condemns this treacherous strike against the civilian population," a ministry statement said.
Russia, which launched a full-scale invasion of Ukraine almost two years ago, has voiced outrage in the past when Ukrainian attacks have killed civilians in Donetsk and other areas.
Russia's own campaign of air strikes and heavy shelling, however, has killed thousands of Ukrainian civilians.
The governor of the Ukrainian-controlled part of the region, Vadym Filashkin, said Russian attacks killed at least two people at two locations west of the city of Donetsk on Sunday.
At Kurakhove, about 45km from Donetsk, shelling killed a 31-year-old man and injured another person, while a 62-year-old man was killed and a 70-year-old man injured at Krasnohorivka between Donetsk and Kurakhove, he said.
"I call on everyone who remains in Donetsk: evacuate!" Filashkin said in a post on the Telegram messaging app.
Donetsk is one of four regions in Ukraine's east and south that Russia claimed to have annexed in late 2022 in a move condemned as illegal by most countries at the UN General Assembly.
Russia does not fully control any of the four regions.
In three other incidents in the region, Pushilin said, a man born in 1979 was killed and another born in 1957 wounded by shelling, and another four people were injured.
Separately on Sunday, Russia's defence ministry said Russian forces had taken control of the village of Krokhmalne in Ukraine's northeastern Kharkiv region.
A Ukrainian military spokesperson confirmed that Kyiv's forces had withdrawn from the area but said the lost territory was tiny and of no consequence for the overall military situation.
