A blast last night rocked a central Iowa factory that makes cardboard boxes, leaving four people injured. The investigation is underway in Story City after an explosion about 11 o’clock Monday night. When emergency crews arrived at American Packaging, employees were being evacuated. One person was hospitalized. Three others were taken to the hospital for treatment for exposure to chemicals. Foam and blankets were used to smother the flames and get rid of the chemical fumes.
