Inmate from LA County allegedly killed in prison by other inmates: Officials

William Quintero (left); Jose Perez (middle); Juan Serrano (right / California Department of Corrections and Rehabilitation

Authorities are investigating a homicide at Centinela State Prison after two inmates allegedly killed a fellow inmate in a recreation yard, according to the California Department of Corrections and Rehabilitation. 

Officials said inmates Jose Perez, 46, and Juan Serrano, 34, allegedly attacked inmate William Quintero, 47, in a recreation yard the morning of Nov. 14. Two "inmate-manufactured weapons" were also recovered.

Quintero suffered multiple injuries and was airlifted to a local hospital where he died. His official cause of death has not yet been released by the Riverside County Coroner. 

No staff members were injured. 

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Officials said Perez and Serrano have been moved to segregated housing as the investigation continues on what led up to the attack. Additionally, only a limited number of people are being allowed in the recreation yard for the time being. 

Quintero was admitted in 1999 from Los Angeles County to serve a life sentence for charges including murder, kidnapping, and robbery.

Perez and Serrano are both serving life sentences for first-degree murder among other charges.