NORCO, Calif. --
A brawl at a Riverside County prison involving about a dozen inmates sent four men to the hospital with stab wounds. Guards put the California Rehabilitation Center on lockdown after a fight broke out on Sunday, involving 10 to 15 inmates, in a prison dorm. The four injured men are in serious condition but are expected to survive.
Several other prisoners suffered minor injuries in the brawl including scrapes, cuts and bruises.
The Norco facility holds approximately 5,000 inmates.
The Associated Press contributed to this report.