The investigation continues after an inmate at the Tecumseh State Correctional Institution is accused of assaulting several staff members earlier this week.
The Nebraska Department of Correctional Services says incident took place on Monday.
The inmate is accused of becoming aggressive, striking three staff members and spitting on a fourth staff member.
Corrections says one employee who was struck in the head was taken to a hospital for treatment of a serious injury.
The department says findings will be provided to the Johnson County Attorney for any charging decisions and criminal prosecution.
Corrections say a disciplinary process will be utilized with sanctions, such as loss of good time, applied according to the rules and regulations.
(Picture from Nebraska Corrections)