After a dining hall riot broke out at San Quentin on Sunday, four prisoners were hospitalized with non-life-threatening injuries. The minor melee involved at least 200 convicts. No idea what, exactly, prompted the fisticuffs. However, the Examiner reports that "[t]he men ended up with stab and slash wounds after the riot erupted around 6:50 p.m." and no staff members were injured.

Located just across the Golden Gate Bridge, San Quentin State Prison is the state's oldest prison and houses an estimated 5,000 men. Some of the country's most notorious criminals -- including Richard Allen Davis, Cary Stayner, and Richard "The Night Stalker" Ramirez -- call the place home.