Authorities say no bomb was found at a high school in central Iowa after a threat was reported in a girls' restroom. the Indianola Police Department says officers did a sweep of Indianola High School on Thursday and found nothing. A bomb threat on a note was reported earlier in the day. Classes at the school were dismissed at about 11 a.m. The school's principal announced over the intercom that students who drove to school should leave. Students who ride buses were taken to a facility at Indianola Middle School where parents could pick them up. Authorities are still investigating who may have been involved. Classes are expected to resume Friday.