WAUPUN, WI (WTAQ) - An inmate serving 10 years on a second-degree homicide charge has been placed in segregation at the Waupun Correction Institute.

Officials at the facility say that inmate attacked a prison officer Monday morning at about 7 a.m. The attack resulted in the shutdown of the cell block for about five hours.

The injured officer was treated, then returned to duty.

The Dodge County Sheriff’s office says additional charges are now pending against the inmate. No one else was involved in the attack.