Breaking the Silence, an advocacy group of Israeli military veterans, has published the testimony of a soldier who served in the prison camp for detainees from Gaza, Al Jazeera reports.

“For months, we’ve been hearing gruesome testimonies from detainees, soldiers, doctors and more about the horrific conditions and abuse at the Sde Teiman prison camp,” the advocacy group said in a post on social media.

The soldier told the rights group of prisoners held in “a covered enclosure, like a cowshed”.

“We were in a facility that had two cells. When I say cells, I mean large cells. They called [them] ‘pens’. One pen [had] 70 people and one [had] 100 people [sitting] in rows on ultra-thin outdoor mattresses” on an asphalt floor, the soldier said.