The United Nations' highest human rights agency has commissioned a team of specialists to investigate rights breaches in Ukraine.
On Friday, the team said that preliminary findings from their study show that Russia's invasion of Ukraine about seven months ago resulted in war crimes.
Commission of Inquiry on Ukraine, which was established earlier this year by the Human Rights Council.
They presented their most comprehensive findings to date, which included testimony from former inmates alleging torture including as beatings.
As the inquiry's chairman, Erik Mose, put it, "the commission is now examining similar fatalities in 16 towns and communities.
On Friday, he reported to the Human Rights Council that his team had received "reliable claims relating many more incidents of executions".