SUSANVILLE, Calif. (AP) _ Two dozen prison inmates who didn't want to be strip-searched in a hunt for weapons went on a rampage, injuring 11 guards, authorities said Tuesday.

Guards discovered homemade weapons in a laundry bag Monday and began strip-searching small groups of inmates at High Desert State Prison.

``The searches were to determine whether they had any contraband. One group said it wasn't involved and didn't want to go through a strip-search, and that's when one of the inmates started assaulting a correctional officer,'' said state Corrections Department spokeswoman Margot Bach.

The guards were treated for minor injuries and released from the prison hospital. A dozen inmates also suffered minor injuries.

Guards used pepper spray and batons on inmates and those involved were placed in isolation, said prison spokesman Lt. Chuck Spirk.

High Desert, about 130 miles northeast of Sacramento, holds about 4,700 prisoners.