BATAVIA - A small school bus carrying 14 people collided with a dump truck Wednesday, seriously injuring a high school student, the bus driver and a teacher's aide, state police said.

Ten students and three staff members were on a field trip in the Le Roy Central School District bus when it rear-ended the truck, which was waiting to make a left turn at about 10:30 a.m., state police Sgt. Daniel Dedo said.

The impact swung the truck 90 degrees across the road, where it was hit by a car that had been traveling behind the bus, Dedo said.

Neither the truck driver nor the driver of the car was seriously hurt.

“It appears the school bus driver was at fault,” Dedo said, while cautioning the accident was still under investigation.

No tickets were immediately issued, said Trooper Rebecca Gibbons, a state police spokeswoman.

Three rescue helicopters carried the most seriously injured to Erie County Medical Center in Buffalo.

Gibbons identified them as: John Peck, the 68-year-old bus driver; aide Sue Lawrence, 31; and student Jeremy Perry, whose age was listed as 17 or 18.

All were listed in fair condition Wednesday afternoon, hospital spokesman Joe Cirillo said.

Gibbons said Peck was the most seriously injured.

The other 11 passengers were taken to United Memorial Medical Center in Batavia, where they were treated for bumps, bruises and other minor injuries, hospital spokeswoman Colleen Flynn said. All were released by 2:30 p.m.

The students, ages 16-19, were on a field trip to a veterinary clinic in nearby Corfu, west of Batavia, when the crash occurred along a rural stretch of farm fields and tall grass on Route 33 between Buffalo and Rochester.

The yellow bus, with major damage to the front end, was towed away about 3 1/2 hours after the crash.