BAKERSFIELD, Calif. (AP) — Officials say cell locks failed during a brawl involving 120 prisoners at a central California jail that left four inmates injured last week.

Tyson Davis, the chief deputy who oversees the Lerdo Pre-Trial Facility, told KBAK-TV Wednesday that the locks are old and inmates have begun to tamper with them, with some success.

The Kern County Sheriff's Office said several inmates became disruptive Feb. 6 and refused to comply with the night's lockdown. The violence sent four inmates to hospitals and left housing units damaged.

The labor union representing the guards says low staffing also contributed to the problem.

The Lerdo lockup north of Bakersfield is being improved and expanded and a new facility is expected to begin housing inmates by May.


Information from: KBAK-TV,