GRAY SUMMIT, Mo. - Missouri state troopers say the two people killed in a chain-reaction freeway accident involving a tractor trailer cab, two school buses and a pickup truck were a girl on one of the buses and the driver of the pickup.

Authorities say the buses were taking the high school band members from St. James to a Six Flags amusement park when the collision on Interstate 44 west of St. Louis occurred.

The Missouri State Highway Patrol says the pickup truck slammed into the back of the tractor, which had slowed for traffic near a construction zone near Gray Summit west of St. Louis.

The bus carrying the girl then struck the pickup from behind and was rear-ended by the other bus.

Dozens of children were taken to area hospitals, mostly with injuries not considered life-threatening.

Broadcast reports say as many as 50 people have been injured in an accident involving two school buses and a tractor-trailer near St. Louis.

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Broadcasters KMOX and KMOV in St. Louis cited officials with the Franklin County Sheriff’s Department as saying up to 50 people were injured in the wreck.

That department did not confirm the number to The Associated Press and referred questions to the Missouri State Highway Patrol.

The patrol did not immediately return a call seeking comment.

Details about the injuries were not immediately known.

The buses were carrying children from the St. James School District.