Inmates at the Los Angeles County Men's Central Jail beat and stomped another inmate to death after guards locked them in an unsupervised holding room this week, according to recently reports. Reportedly, the inmates were left unsupervised while officials searched jail cells for contraband and weapons.

Two inmates attacked another inmate, who they said cut in front of them to receive his dinner tray. The attackers spent about 10 to 15 minutes beating and stomping the victim's head, at one point jumping off a steel bench onto the man while the other inmates watched in silence, officials said.

The incident was the eighth killing inside the jail in the last two years and came despite assurances by Sheriff Lee Baca last year that he was taking steps to increase security and improve segregation of violent inmates. It also came despite repeated warnings from the American Civil Liberties Union about the dangers of housing inmates without supervision.