“Firefighting devices were discharged directly on to people in detention and, in one disturbance, into enclosed areas where people had retreated, including people who had not been involved in the disturbances,” the ombudsman said.
A spokesperson for Serco said: “The safety of all detainees in our care is of paramount importance to Serco. “Our priority is always to treat people in our care with dignity and respect in a safe and secure environment.