Six state correctional officers were recovering from injuries after they were attacked by an inmate Thursday at the California Men's Colony in San Luis Obispo.
At least one of the officers was seriously injured by the inmate, who used his fists and a plastic cup to batter the officers, according to the California Department of Corrections and Rehabilitation.
State authorities identified the inmate as Christopher McCoy, 34, who is serving a life sentence without the possibility of parole for a first-degree murder conviction.
McCoy was attempting to commit suicide Thursday morning, according to correctional authorities, and he is suspected of turning on the officers after they tried to stop him.
The injured officers were treated at a hospital and released. McCoy was also treated for unspecified injuries.
The matter was referred to the San Luis Obispo County district attorney's office for prosecution, state authorities said.
The prison opened in 1964 and houses 5,100 minimum- and medium-custody inmates.