UPDATED: Union Comments On Pontiac Prison Assault, Officers Released

The Pontiac Correctional Center has been put on lockdown while state officials investigate the assault of six employees by five inmates. Illinois Spokeswoman Nicole Wilson said the prison will remain on lockdown until the investigation is finished.

The Union representing Illinois prison workers says an inmate punched a female correctional lieutenant, knocking her down and sparking the ensuing altercation.

The American Federation of State, County and Municipal Employees said Monday that four correctional officers and two lieutenants at the prison were treated for abrasions, contusions and possible concussions suffered in the incident Sunday.

They have all been released from the hospital.

Information provided by the Associated Press