A Correctional Sergeant and Correctional Officer were assaulted at Pontiac Correctional Center Wednesday.

Union leaders say the officers were stabbed with a handmade weapon. The two officers survived but the sergeant had to be transported for emergency treatment.

He was airlifted to a Peoria hospital for treatment. The correctional officer who was also injured as he rushed to the sergeant’s aid and has since been treated for his injuries and released.

The facility has been placed on lockdown.