KFYR TV has reported that the North Dakota State Penitentiary is on lockdown.

An assault that caused the ND State Penitentiary to go on lockdown just before 7 p.m. on Wednesday, December 9 is under criminal investigation. A state penitentiary official has confirmed that an inmate was assaulted but has non-life threatening injuries.

The penitentiary will remain on lockdown until further notice.

We will update this story as more information becomes available.