Ukrainian President Volodymyr Zelensky has urged his people to persevere in the face of Russian attacks as the country celebrates Christmas.
In a defiant speech on Saturday, he said: “Freedom comes at a high price. But slavery has an even higher price.”
Russia’s missile and drone attacks have left millions of Ukrainians without power, heating and running water.
Earlier on Saturday, Russian air strikes killed 10 people in Ukraine’s southern Kherson city, officials said.
The regional authorities said another 68 people were injured and called on local residents to urgently donate blood.
Describing Russia as a “terrorist country”, Mr Zelensky accused Russian troops of “killing for the sake of intimidation and pleasure”.
In a post on social media, he showed pictures of streets strewn with bodies and burning cars, saying “the world must see and understand what absolute evil we are fighting against”.
Kherson, the only regional capital captured by Russia since it launched its full-scale invasion on 24 February, was liberated by Ukraine last month.
Since then it has been frequently targeted by Russian forces positioned on the left (eastern) bank of the Dnipro river.
Moscow has repeatedly denied targeting civilians in its attacks. However, President Vladimir Putin has recently admitted that Russian troops have been hitting Ukraine’s critical energy facilities.
Most Ukrainians are Orthodox Christians, and mark Christmas Eve – the main day of the festive season in the country – on 6 January.
However, a growing number of worshippers have been celebrating the day on 24 December, in line with the majority of Christians around the world.