( CNN ) -- A central Arizona prison remained in lockdown Friday , a day after 10 inmates were injured in a lunchroom brawl . The `` inmate-on-inmate altercation '' broke out during lunch Thursday in a part of the Red Rock Correctional Center that houses prisoners from California , the facility said Friday in a news release . Forty-three inmates were involved , and as of Friday all were secluded from the rest of the prison population `` pending further investigation and appropriate disciplinary action , '' according to the statement . Ten of those inmates were hurt , including seven who were transported off-site for treatment . As of Friday , one remained in a hospital after suffering a non-life-threatening injury , Red Rock Correctional Center said . Most of those sent to hospitals had head injuries , said Officer Michael Andonie , a policeman in Eloy , where the prison is located . Prison staff defused the situation within 10 minutes of the fight breaking out , according to the correctional facility , adding that inmates complied with orders . No staff members were injured in the melee . Besides representatives from Red Rock , officials with the California Department of Corrections and Rehabilitation are looking into the incident . The prison is a private facility owned by Corrections Corporation of America , said Andonie . It is about 55 miles northwest of Tucson and 60 miles southeast of Phoenix .
NEW : An `` inmate-on-inmate altercation '' left 43 inmates hurt , the correctional facility says . NEW : The fight , in a unit housing Arizona prisoners , was quelled in 10 minutes . NEW : All 10 inmates involved were secluded , and the prison remains in lockdown . The incident occurred at a privately run prison in central California .