SHAMROCK, Texas — Authorities say three members of a Mississippi family were killed and three others injured when their SUV slid off a slick Texas Panhandle highway and struck an oncoming vehicle.

Texas Department of Public Safety Sgt. Cindy Barkley says 35-year-old Elizabeth Johanson of Cleveland, Mississippi, was driving too fast in wintry weather when the SUV careened off Interstate 40 near Shamrock on Thursday.

The SUV crossed the median, traveled into westbound traffic and struck a recreational vehicle carrying a California couple.

Johanson and her husband, 35-year-old Adam Johanson, died at a hospital. Their 10-year-old daughter died at the scene.

Two of their other children, one 3 and the other 5, were taken to a hospital with life-threatening injuries. A 12-year-old daughter was treated and released.

The California couple was not injured.