A crash in St. Louis involving a school bus and a minivan has injured four people. It occurred around 7:30 this morning as the bus was taking the kids to school. Two students from the bus and two people who were in the SUV were taken to an area hospital, but police say the injuries are not believed to be serious. The other children and the remaining minivan passengers were taken to a hospital as a precautionary measure. The cause of the crash is being investigated.