Duffield declined to release the name of the male bus driver, pending notification of next of kin.
The crash, reported around 6:30 a.m. Monday, tore off the front part of the bus.
Department of Public Safety spokesman Tom Vinger said the cause of the collision is under investigation. Vinger had no information indicating the trucker was hurt.
A spokeswoman for Belton ISD did not immediately return a call to AP.
Belton is about 55 miles north of Austin.
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