CASPER, Wyo. (AP) — Authorities have identified the two women killed in a head-on collision on U.S. Highway 30 near Kemmerer in southwestern Wyoming.

The Wyoming Highway Patrol said Sunday that 60-year-old Verna P. Prater, of Kemmerer, was driving west when her car hit a mile marker post Friday afternoon. The vehicle crossed into the eastbound lane and struck a vehicle driven by 60-year-old Kathleen Collings, of Afton.

Authorities say Prater died at the scene and Collings died aboard an aircraft en route to a hospital in Salt Lake City on Friday night. Both had been wearing seatbelts.

A 4-year-old boy in the backseat of Prater's car was hospitalized. A front seat passenger in Collings' car was treated and released from a hospital, while a 12-year-old in the backseat was hospitalized.

Authorities are investigating.