Dozens of people held at a sprawling Immigration and Customs Enforcement facility in Texas say they were either beaten by guards or witnessed others being beaten, according to a new report issued by legal and human rights advocates.

The 84-page report issued jointly Wednesday by Human Rights Watch and the American Civil Liberties Union also says men and women held at Camp East Montana, located at the U.S. Army’s Fort Bliss in El Paso, recounted being denied necessary medical care, forced to live in filthy conditions and fed inedible meals. Detainees also said they were prevented from contacting their lawyers or family members.

Of the 71 detainees contacted over a five month period, 64 — about 90% of those interviewed — said they had either personally been assaulted by the staff or had seen others physically abused, according to the report.