The Kern County coroner's office says an inmate killed during a fight this week during a prison riot died from a gunshot wound.
The office released the results of its autopsy of Wasco State Prison inmate Angel Torres on Tuesday. It gave his age as 21, though the office previously said he was 22.
Lt. Floyd Harl, a prison spokesman, said a guard fired one bullet to quell fighting among about 40 inmates Monday morning.
Two other inmates also were taken to outside hospitals for treatment. Harl said Tuesday that it was unclear what caused their injuries. Several inmate-made knives were recovered.
Several other inmates were treated at the prison for minor injuries.
Torres was serving an 11-year Riverside County sentence for assault with a deadly weapon.