An overnight prison riot at the California Institution for Men in Chino left 250 inmates hurt, 55 of whom were hospitalized with serious injuries. None of the prison's employees were hurt in the riot, which started at 8 p.m. on Saturday and wasn't under control until 7 a.m. Sunday. The medium-security housing facility, which houses 1,400 prisoners, was the scene of the riot. More than 80 officers rushed to the scene and used "less lethal force and lethal force options" to regain control of the prison, which was partially damaged by fire. Prisoners reportedly used broken glass as a weapon, and their injuries ranged from stab wounds to head trauma. The facility is on lockdown as officials investigate the cause of the riot.