FOLSOM, Calif. — Authorities say the death of a state inmate is being investigated as a homicide after an apparent struggle between two cellmates at a Northern California prison.

California State Prison, Sacramento, officials say 48-year-old Juan Victoria was found unresponsive in his cell before noon Monday.

His cellmate, 34-year-old David Acuna, had what officials say were minor injuries showing a possible struggle between the two inmates.

Victoria was serving a 24-year sentence from Sacramento County for voluntary manslaughter with a firearm, assault, false imprisonment, and injuring a spouse or cohabitant.

Acuna is serving a life sentence, also from Sacramento County, for murder and arson.

Inmates’ movements in one housing unit of the maximum-security prison have been restricted during the investigation.