BAKERSFIELD, Calif. (AP) — A two-hour brawl involving 120 prisoners at a San Joaquin Valley jail left four inmates with injuries that required hospital treatment.

The Kern County Sheriff’s Office says the incident at the Lerdo Pre-Trial Facility north of Bakersfield began around 9:30 p.m. Tuesday.

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According to a statement, several inmates became disruptive and refused to comply with the night’s lockdown and inmate count procedure.

Lerdo Pre-Trial Facility. (Kern County Sheriff's Office)

Lerdo Pre-Trial Facility. (Kern County Sheriff’s Office)

Fighting broke out and spread before being quelled by special sheriff’s units assisted by Bakersfield police and California Highway Patrol officers.

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The violence left housing units damaged and inmates were placed elsewhere in the large facility so that repairs could be made.

The jail remains on lockdown and visits are suspended.

Lerdo is the county’s largest lockup, with a capacity of 1,230 inmates.

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