Ukraine's President Volodymyr Zelenskiy attends a meeting with European Parliament President Roberta Metsola (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 1, 2022. Ukrainian Presidential Press Service/Handout via REUTERS
Ukraine's President Volodymyr Zelenskiy attends a meeting with European Parliament President Roberta Metsola (not pictured), as Russia's attack on Ukraine continues, in Kyiv, Ukraine April 1, 2022. Ukrainian Presidential Press Service/Handout via REUTERS Reuters / UKRAINIAN PRESIDENTIAL PRESS SER

Ukrainian President Volodymyr Zelenskiy accused Russia on Sunday of committing genocide in his country, as Western leaders condemned images emerging of dead Ukrainian civilians in a town abandoned by Russian forces outside the capital, Kyiv.

"Indeed, this is genocide. The elimination of the whole nation and the people," Zelenskiy told CBS' "Face the Nation" news program, speaking through a translator.

"We are the citizens of Ukraine and we don't want to be subdued to the policy of Russian Federation. This is the reason we are being destroyed and exterminated."

Zelenskiy's remarks came a day after Ukrainian forces moved into the town of Bucha near Kyiv and found what officials and witnesses said were the bodies civilians killed by Russian forces.

Russia's defence ministry denied the allegations, saying footage and photographs showing dead bodies in Bucha were "yet another provocation" by Kyiv.

Human Rights Watch (HRW) said on Sunday that it had found "several cases of Russian military forces committing laws-of-war violations" in Russian-controlled regions such as Chernihiv, Kharkiv, and Kyiv.

Asked whether Russian President Vladimir Putin would be held accountable, Zelenskiy said others also shared the blame.

"I think all the military commanders, everyone who gave instructions and orders should be punished adequately," he said.

Asked what would constitute adequate punishment, he said: "When we find people with hands tied behind their back and decapitated ... I don't know what law or what imprisonment term would be adequate for this."

U.S. Secretary of State Antony Blinken said the images of dead Ukrainian civilians found in Bucha were a "punch in the gut" and those responsible must be held accountable.

NATO Secretary-General Jens Stoltenberg called the killings in Bucha a "brutality" unseen in Europe for decades.

Asked whether Russian forces would need to withdraw to positions before the Feb. 24 invasion, Zelenskiy said: "It should be 100% withdrawal of troops to the borders that existed prior to the 24th of February, at least."

"This would make us to at least start discussing other questions about the deoccupation," he said.