At least 10 people, including three corrections officers, were taken to hospitals Thursday evening after a massive fight broke out at the state prison on South Wilmot Road.
At least two inmates suffered serious injuries.
The fight started about 5:30 p.m. and involved about 200 Hispanic and black inmates in the Santa Rita unit, according to an Arizona Department of Corrections news release.
Corrections officers regained control of the unit about 6 p.m.
The Tucson Fire Department sent ambulances to the prison, at 10000 S. Wilmot Road.
Three corrections officers were injured in the fight, including one officer who suffered a rib-cage injury, said DOC and hospital officials.
The inmates involved suffered various injuries, although officials did not know the details of the injuries late Thursday.
According to a University of Arizona Medical Center official, five inmates were taken to the hospital's University Campus and five people, including three officers, were transported to its South Campus.
At the University Campus, one person was in the operating room late Thursday, one was in intensive care and three were admitted for observation, said hospital spokeswoman Darci Slaten.
Two officers, along with two inmates, were in stable condition at the South Campus, Slaten said. A third officer was treated and released.
The entire state prison complex in Tucson was placed on lockdown after the fight.
Prison officials will keep the Santa Rita Unit on lockdown for several days while they investigate the brawl. The cause of the fight was still under investigation. There are 727 inmates in the unit.
Contact reporter Jamar Younger at firstname.lastname@example.org or 573-4115.