Nearly two dozen students suffered minor injuries when two Bald Knob school buses were involved in an accident. No critical injuries were reported in the mishap at a city intersection, but 19 students were taken to a hospital. Four others were treated for minor injuries at the scene and sent home. Police said they didn`t know why one bus rear-ended another at an intersection. Sergeant Laura Calhoun of the Bald Knob Police Department said no other vehicles were involved.