EVANSTON, Wyo. (AP) — Three people were killed and four others were injured in a crash on Interstate 80 in southwest Wyoming.

The Wyoming Highway Patrol says 38-year-old Marco Carr, of Salt Lake City, rear-ended a tractor-trailer near Evanston late Wednesday night, and his minivan was then hit by another tractor-trailer. Carr died at the scene.

Also killed were 28-year-old Rebecca Nowlin, of Salt Lake City, and a 7-year-old passenger whose name has not been released. Four other children in the minivan were taken to a nearby hospital in critical condition.

The truck drivers were not hurt.

Investigators say Carr might have been going too fast for the wintry conditions. I-80 was covered with snow and ice at the time.