BUCKEYE, Ariz. -- Several inmates were injured Thursday after a fight broke out at the state prison in Buckeye.
Arizona Department of Corrections spokesman Doug Nick said fewer than 100 inmates at the Stiner Unit of the Lewis complex got into a fight about 4:15 p.m.
"This was because of some racial tensions that had been recently exposed and ... came to a boil," Nick said.
Ten inmates were taken to local hospitals, one of whom had critical injuries, according to Nick.
Authorities said the fight in the medium-security dormitory area was quickly brought under control with the help of distraction devices.
"Those distraction flashes ... are non-lethal rounds," Nick said. "They are very disturbing and they get people's attention very quickly."
No prison staff members were injured trying to break up the fight.
The prison was on lockdown Thursday night and the Stiner Unit will remain on lockdown until at least next week, according to Nick.
He also said the investigation is ongoing, and any inmates identified as instigators will be moved to a higher level of custody. They could also face additional charges.
The Associated Press contributed to this report.