ST. LOUIS (AP) — Scaffolding has toppled over at a St. Louis safety fair for Ameren employees and injured four people. The Post-Dispatch reports that wind gusts of up to 35 miles per hour are blamed for blowing over the scaffolding Saturday afternoon by an entrance to the utility's event. Ameren officials said three people were taken to local hospitals, but all but one of them had been released by Saturday night.