California Department of Corrections and Rehabilitation (CDCR) officials are investigating after a death row inmate was killed at Kern Valley State Prison in Delano on Friday.

Convicted murderer Mario Renteria, 36, allegedly started beating fellow inmate, Julian Mendez, 46, at about 10:30 a.m. Friday, prompting prison staff to respond.

Officers ordered them to get down, but the men failed to comply, according to a CDCR news release obtained by Fox News Digital.

Chemical agents initially stopped the attack, but more than 30 additional inmates rushed Renteria and began striking him.

Orders to stop were ignored, and staff used multiple blast grenades to quell the violence, according to CDCR.

Mendez suffered multiple wounds, and life-saving measures were immediately taken.

He was taken t

See Full Page