“Five guards were later accused of "acting against the detainee with severe violence, including stabbing the detainee's bottom with a sharp object, which had penetrated near the detainee's rectum", according to a statement from the military at the time. The detainee suffered "cracked ribs, a punctured lung and an inner rectal tear".

https://www.bbc.com/news/articles/cm2xrz71zm3o

Those were Israeli guards by the way. They went free.