Ukrainian President Volodymyr Zelenskyy has condemned Russia after a mass burial site was found in Izyum in the country's Kharkiv region.
Zelenskyy said in an online video on Friday that more than 440 graves had been found in Izyum, but added, "It is too early to say about the number of people buried there." He said there was clear evidence of torture, and the humiliating treatment of people.
He said Russia has repeated in Izyum what it did in Bucha. Bodies of more than 400 people were found in the town of Bucha, northwest of Kyiv, after Russian troops withdrew from the area.
A Ukrainian prosecutor overseeing the investigation told reporters that there were numerous bodies with signs of torture, with ropes tied around their neck and hands. The prosecutor said that more than 500 civilians could be buried in the mass grave.
US Secretary of State Antony Blinken said in a news conference on Friday that building the evidence and documenting was important "to making sure that those who've committed atrocities and those who ordered them are held accountable."
He said the United States would work with other countries to pursue Russia's "atrocities" that are likely to amount to war crimes.
A spokesperson for the Office of the UN High Commissioner for Human Rights said the organ wants to send a team to Izyum to investigate.