No children were seriously hurt, but the driver of another vehicle was injured when a school bus overturned Tuesday morning in Jefferson County.

About two dozen children in kindergarten through sixth grade were on the bus heading to Maple Grove Elementary and Cedar Hill Intermediate schools in the Northwest R-1 School District south of St. Louis, a school official said.

The children, the bus driver and the driver of the other vehicle were taken to St. Anthony's Medical Center, said Sgt. Al Nothum with the Missouri State Highway Patrol.

"The bus went off the road and down an embankment," said Ken Rossics, director of administration for the district which has about 7,000 students. But, he said, the students and the bus driver did not suffer serious injuries.

The Highway Patrol said the other driver appears to be seriously hurt. The accident, on a two-lane stretch of Highway 30 outside of Dittmer near Cedar Hill, remains under investigation.