A man works to catalog some of 58 bodies of civilians killed in and around Bucha before they are transported to the morgue at a cemetery on April 6, 2022 in Bucha, Ukraine.
CNN  — 

A new report from the Organization for Security and Cooperation in Europe found that patterns of violent acts by Russian forces in Ukraine meet the qualification of crimes against humanity, detailing horrific actions by Russian forces including the discovery of torture chambers at a summer camp in Bucha.

The new report released Thursday was the latest instance of groups documenting potential war crimes committed by Russian forces. The OSCE experts who put together the report traveled to Kyiv and met with Ukrainian authorities there as well as Bucha and Irpin, where they found “grave breaches” of international humanitarian law and the Geneva Convention.

The report “found credible evidence” that suggested “some patterns of violent acts which had been repeatedly documented during the conflict,” including “killing, rape abductions or massive deportations of civilians, qualified as a widespread or systematic attack against a civilian population.”

The OSCE mission that compiled the report wrote that 1.3 million Ukrainian citizens have been deported against their will to Russia and said there was evidence that tens of thousands of civilians had been detained at so-called filtration centers before being transported to Russian-controlled areas of eastern Ukraine.

US Ambassador to the OSCE Michael Carpenter said in a statement that the report “gives us an opportunity to pull back and document the unconscionable atrocity crimes, human rights violations, and abuses members of Russia’s forces have committed.”

This week’s report is the second that OSCE has released documenting atrocities committed against the Ukrainian population. In April, the group released its first report with similar findings of “credible evidence” suggesting violations of “even the most fundamental human rights.”

Together, both reports “comprise the most comprehensive accounting of evidence to date of Russia’s human rights abuses, international humanitarian law violations,” State Department spokesman Ned Price said in a statement after the second report’s release Thursday.

“The United States and our partners will seek to hold accountable those responsible for all human rights abuses and violations of international humanitarian law, including war crimes, they commit in Ukraine,” Price added.

The report noted that it had identified “numerous violations” of international humanitarian law that constituted war crimes, “if the responsible individuals can be found.”

“These violations included mistreatment of prisoners of war, deliberate killing of civilians, deliberate attacks against civilians and against civilian objects, including schools, hospitals or cultural property, or the failure to respect the principles of distinction, proportionality, and precautions,” the report said.

The second report covered the period between April 1 to June 25. The OSCE experts traveled to Ukraine to collect evidence, including visiting the towns of Bucha and Irpin, which the report said were “two emblematic examples of the breaches of International Humanitarian Law under the Geneva Conventions and their Additional Protocols, which constitute war crimes.”

The experts noted that photographic and video evidence showed Russian forces caried out “targeted, organized killings of civilians in Bucha” who were found shot dead with their hands tied behind their backs.

‘Series of torture chambers’

The report documented a “series of torture chambers separated by concrete walls” discovered at a summer camp in Bucha, including a room that the report said appeared to be used for executions with bullet holes in the walls.

In another room where experts said there was evidence of torture and waterboarding, five dead men were found. “They were covered with burns, bruises, and lacerations,” the report said.