KANSAS CITY, Mo. (AP) — Jackson County and the FBI are investigating four cases of guards accused of abusing jail inmates.

County Executive Mike Sanders announced the investigations Monday.

Sanders says he’s also forming a citizens task force to look into practices at the Jackson County Detention Center.

Recent injuries to four male inmates ranged from bruises and stitches to a man who suffered a broken neck when he was restrained.

Joe Piccinini, acting director of county corrections, learned there was a problem last month when a nurse informed him an inmate had been hospitalized with a broken neck. He says none of the accused guards still work for the county.

Sanders says county officials have been cooperating with the federal probe for more than a month.