POSTED: Friday, August 6, 2010 - 7:12am
UPDATED: Friday, August 6, 2010 - 7:13am
Two people were killed and dozens more injured Thursday in a highway wreck involving two school buses and a semi near St. Louis.
The bus wound up on top of a semi cab, with a pickup truck wedged underneath.
The second bus crashed into the back of the first.
One of the dead was on a bus, the other in the pickup.
Investigators say the chain reaction crash started when the semi driver slowed down for traffic due to construction.
42 students went to area hospitals mostly with minor injuries.
The buses were carrying high school band students to a Six Flags Amusement Park.