GRAND TETON PARK - A 55-year-old man died Monday morning after he was ejected from his truck near Gros Ventre Bridge in Grand Teton National Park.

Before 8:30 a.m., the man was driving south on Highway 89 and hit a patch of black ice just south of the bridge. The Freedom, Idaho, man lost control of his truck, crossed into the northbound lane, rolled and slid off the embankment on the east side of the highway.

Witnesses called 911 and one passerby started CPR. A member of Jackson Hole Fire/EMS and park rangers arrived, along with park emergency medical technicians, from park headquarters at Moose.

When emergency crews arrived, they declared the man dead.

Investigators believe the man was not wearing a seat belt. No one else was injured.

A German Shepherd dog riding in the truck was taken to Spring Creek Animal Hospital for evaluation. The dog was determined to be in good condition.