There was a riot overnight at the California Institute for Men in Chino lasting nearly 11 hours (8:20pm to 7am), with a housing unit badly damaged by fire, 250 injuries and 55 inmates hospitalized. According to a prison spokesman:

The inmates’ injuries ranged from stab wounds and slashes to head trauma, Hargrove said. Some were considered life-threatening.

Hargrove said inmates used “weapons of opportunity” such as broken glass during the riot.

The prison is locked down for investigation into what started the riot. Comes at an interesting timing with the recent ruling that California must reduce its prison population by 40,000.