A group of United Nations experts on Monday demanded an immediate and thorough investigation into reports that Israeli forces have arbitrarily detained, sexually abused, and executed Palestinian women and girls in the Gaza Strip.

“Some of them were reportedly holding white pieces of cloth when they were killed by the Israeli army or affiliated forces,” the U.N. experts continued. “We are particularly distressed by reports that Palestinian women and girls in detention have also been subjected to multiple forms of sexual assault, such as being stripped naked and searched by male Israeli army officers. At least two female Palestinian detainees were reportedly raped while others were reportedly threatened with rape and sexual violence.”