RENO, Nev. — Authorities plan to look into the driving and medical records of the semitrailer driver who died when the truck slammed into an Amtrak train, killing a train crew member and injuring dozens of passengers.

Peter Knudson, a spokesman for the National Transportation Safety Board, said they also will look at autopsy results to determine whether the driver had consumed any drugs around the time of the collision Friday.

The big rig plowed into the California-bound train at a crossing in a rural area about 70 miles east of Reno. Knudson said federal investigators would make sure that railroad lights and crossing gates were working at the time.

Witnesses told authorities that the truck didn’t seem to attempt to stop at the crossing when it crashed through the gate. The driver was the sole occupant of the semi, which was hauling two empty gravel trailers.

About 20 people aboard the train were taken to hospitals in Reno and Fallon, but Lopez didn’t know the extent of their injuries. Dan Davis, spokesman for Renown Regional Medical Center in Reno, said two people were in critical condition, four were in serious condition and three were in fair condition.

By The Associated Press