Multiple patients are being treated at University of Iowa Health Hospitals & Clinics for injuries following an explosion and fire at a Marengo plant, about 80 miles east of Des Moines. The Iowa State Patrol tells KCCI that the explosion happened around 11:20 a.m. on Thursday. Many agencies responded within a 30-50 mile radius. The first priority was to account for the people inside the plant, several of which sustained injuries. A few injuries are burn-related. The state patrol tells KCCI that preliminary findings indicate that approximately 30 people were in the plant. All of those people have been accounted for. UI Hospitals & Clinics said that they are treating 10-15 patients who were at the explosion. They cannot comment on specific conditions, but say the majority are in the minor to moderate category.