ANITA, Iowa (AP) — Authorities believe snow contributed to a crash that killed three people and injured eight in a multiple-vehicle crash on Interstate 80 in western Iowa.

A westbound semitrailer truck crossed into oncoming traffic about three miles west of the Anita, Iowa, exit on Saturday morning in snowy conditions.

Iowa State Patrol Sgt. Nathan Ludwig says the semi crashed into a minivan and continued into the ditch, but the truck’s trailer remained on I-80 and an SUV smashed into it.

The collisions killed 41-year-old Rodney Sanborn of Gretna, Nebraska, and 14-year-old Jameson Steckler and 11-year-old Gavin Steckler. The Stecklers from Audubon, Iowa, were in the minivan. Sanborn was in the SUV.

Ludwig says the 31-year-old driver of the semi was driving too fast. He wasn’t hurt.