FOND DU LAC, Wis. (AP) -- Three children were among five injured in a collision between a school bus and two garbage trucks in Fond du Lac County.

The school bus was stopped on a street in Theresa to drop off a student Monday afternoon.

Police say the bus was hit from behind by a Waste Management truck. That truck was then struck by a second Waste Management truck.

The driver of the second truck had to be extricated from the vehicle and was taken by helicopter to a suburban Milwaukee hospital.

The 75-year-old bus driver was taken to a Fond du Lac hospital. The 14-year-old girl being dropped off, as well as two other students, suffered minor injuries. There were 11 students on the bus at the time.

Investigators say the bus had its warning lights on and its stop arm extended when it was hit.