SUSANVILLE, Calif. (AP) — A California prison inmate has been killed in an attack by two other inmates, corrections officials said Wednesday.

Juan M. Boyzo, 25, was attacked Monday night in a day room at High Desert State Prison in Susanville, northwest of Reno, Nevada.

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He died at an outside hospital less than two hours later of numerous puncture wounds to his head and back, officials said.

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Correctional officers detained two inmates after breaking up the assault and recovering two inmate-made weapons. They were identified as Joseph M. Gama, 22, and Joseph B. Sua, 29.

The victim was serving a 12-year sentence from Monterey County for second-degree robbery with a street gang enhancement.

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Gama is serving a 15-year sentence from Stanislaus County for assault with a firearm inflicting great bodily injury and a street gang enhancement. Sua is serving a seven-year sentence from Merced County for possession of a controlled substance in jail or prison.