PONTIAC, Ill. – The Pontiac Correctional Facility has been placed on lockdown after a correctional officer was reportedly stabbed on the job.

According to the union for the Pontiac Correctional Facility, an inmate stabbed a corrections officer in the head with a sharp object during the Sunday day shift.

The inmate was subsequently subdued and the officer was transported to the hospital. The union says the officer was released and is able to walk around.

The Illinois Department of Corrections confirmed that an officer was injured during an incident at the prison, treated, and released from a local hospital.

The IDOC is investigating the incident.