At least 16 people have been killed in a missile attack on the Ukrainian city of Kostyantynivka.
President Volodymyr Zelensky said those killed were "people who did nothing wrong" - and warned the death toll could increase.
Kostyantynivka, in Ukraine's eastern Donetsk region, is near the front line.
"This Russian evil must be defeated as soon as possible," Mr Zelensky added. The authorities in Moscow are yet to comment on the claims.
Among the 16 dead are a child, with 20 others thought to be injured, according to information shared by Ukrainian Prime Minister Denys Shmyhal.
"All services are working," he said, adding: "The fire is contained."
A market, shops and a pharmacy are reported to have been hit in the eastern city, which sits close to the battlefield.
Videos circulating on social media appear to show the moment of the explosion and its graphic aftermath.