ANAMOSA — The Anamosa State Penitentiary was placed on restricted movement following a physical altercation between 22 inmates Thursday morning.The incident started around 7:44 a.m. when several inmates had a “physical confrontation” that lasted about 73 seconds, according to a media release from the Iowa Department of Corrections. Staff members “immediately responded” and took control of the situation.No staff was injured and the inmates involved had no serious injuries.The incident remains under investigation, according to the release.The visiting room is expected to remain closed while the facility is on restricted movement.