Authorities say the cement truck did not clear a railroad overpass, went out of control and hit the school bus.
Officials say the 64 year old bus driver was killed. His name was not released.
Three 6-year-olds and 1 nine-year-old boy are among the injured. They were coming from a summer day camp for developmentally disabled children.
The cement truck driver was also injured and taken to the hospital.
The victims are currently in stable condition.
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