Dante Jeffries | Cook County Sheriff’s Office  

CHICAGO (AP) — Officials say a man charged in the shooting of a Chicago police officer three years ago attacked three correctional officers at Cook County Jail, rendering two of them unconscious.

The sheriff’s department said in a news release that 30-year-old Dante Jeffries attacked the officers early Tuesday. One of the officers was rushed to a hospital for treatment for what the sheriff’s department described as serious injuries.

The sheriff’s department will seek criminal charges against Jeffries and a second detainee who is accused of using keys belonging to one of the officers to let other detainees out of their cells.