The state Department of Corrections said Monday that following Sunday's incident, 22 offenders were placed in administrative segregation, and the rest of the minimum-security prison's inmates are not being allowed to congregate outside of their living units, except for when they go to meals.
The agency is currently investigating and Superintendent Jeff Uttecht will determine when the prison will return to normal operations.
Officials say the first fight broke out at about 6:30 p.m., followed a second fight in the same area a few moments later. Three inmates were treated at a local hospital, with one requiring stitches to the head. No staff members were injured.
Coyote Ridge, located about 40 miles northeast of the Tri-Cities, houses more than 2,550 prisoners and is the largest prison in the state.