Idaho troopers say they're still working with international authorities to notify next of kin following a fatal crash between a pickup truck and a passenger van carrying tourists Thursday evening.

The deaths of at least six foreign nationals in a fiery van crash in eastern Idaho are a reminder that many visitors to two of the busiest U.S. national parks, Yellowstone and Grand Teton, and nearby areas come from around the world.

Seven people were killed after a van and a truck collided on U.S. Highway 20 in Idaho on Thursday, according to police. The crash happened near Henry’s Lake, about 20 miles east of Yellowstone National Park.