The Arizona Department of Corrections says a fight at a private prison Friday night injured seven people.

A spokesman for the department said 150 people were either actively watching or engaged in a fight at the Florence West prison, which is a private facility run by the GEO Group.

ADC said one employee and six incarcerated people were taken to the hospital for non-life-threatening injuries.

By Sunday, the employee and three of the inmates had been released from the hospital.

The Department of Corrections says it is still investigating the cause of the fight.