The victim, a 33-year-old man, was expected to survive, Monroe police spokeswoman Debbie Willis said.
The suspect, 21-year-old Brian D. Rivas, remained in state Department of Corrections custody.
The stabbing was reported at 12:23 p.m. in the Washington State Reformatory, one of four units inside the prison. The suspect was believed to have used “some type of homemade weapon,” Willis said.
The victim suffered multiple stab wounds, corrections spokeswoman Norah West said. The stabbing happened during an altercation between the inmates in a living-area stairwell, she said.
Prison officials limited inmates’ activities for some time after the incident. Visiting also was closed for several hours Friday.
Rivas was moved to a maximum-security unit while the investigation into Friday’s assault continues, West said.
Rivas is serving a 17-year sentence for a first-degree assault from Pierce County.
More Local News Headlines
Lake Stevens police commander files lawsuit claiming retaliation Bicyclist struck and killed in Everett; driver arrested 10:14 a.m. Monthly walks highlight Camano Island trails and parks Community Extra: Calendar Front Porch: Darrington athletes added to local hall of fame Opportunities Applause In Uniform
Our new comment system is not supported in IE 7. Please upgrade your browser here.