United Nations Secretary-General Antonio Guterres has placed Israel and Russia “on notice” that they could be listed next year among parties “credibly suspected of committing or being responsible for patterns of rape or other forms of sexual violence,” according to his annual report to the Security Council on conflict-related sexual violence obtained by Reuters.

The warning stems from “significant concerns regarding patterns of certain forms of sexual violence that have been consistently documented by the United Nations,” Guterres wrote in the report released.

Regarding Russian forces, Guterres said he was “gravely concerned about credible information of violations by Russian armed and security forces and affiliated armed groups” primarily against Ukrainian prisoners of war in 50 official and 22 unofficial detention facilities across Ukraine and Russia.

“These cases comprised a significant number of documented incidents of genital violence, including electrocution, beatings and burns to the genitals, and forced stripping and prolonged nudity, used to humiliate and elicit confessions or information,” the Secretary-General said.

The report notes that Russian authorities have not engaged with Guterres’ special envoy on sexual violence in conflict since Russia launched its full-scale invasion of Ukraine in February 2022.

Israel faces similar scrutiny over documented violations in Palestinian detention facilities. Guterres expressed grave concern about “credible information of violations by Israeli armed and security forces” against Palestinians in several prisons, a detention center and a military base.

“Cases documented by the United Nations indicate patterns of sexual violence such as genital violence, prolonged forced nudity and repeated strip searches conducted in an abusive and degrading manner,” the report states.

Russia’s mission to the United Nations in New York did not immediately respond to Reuters’ request for comment on the report.