WIESBADEN, Germany (AP) _ A bus loaded with children ran off a German autobahn and overturned Friday evening, killing one 15-year-old and injuring at least 20 others.

Police said 10 children were seriously injured in the accident 35 miles northwest of Frankfurt. All 68 children on the bus were suffering from shock and taken to local hospitals, police said.

The accident occurred as the bus was traveling on the A3 autobahn from Cologne to Frankfurt. For unknown reasons, the bus plunged down a 100-foot embankment and overturned.

Hesse state police were investigating. No other details were immediately released.