Authorities say a rock thrown from a highway overpass smashed a windshield and killed a 32-year-old man in Michigan's Genesee County.
The incident occurred Wednesday night in Vienna Township, 80 miles north of Detroit. The sheriff's office says a car was southbound on Interstate 75 when it was hit.
The victim was a passenger. His name hasn't been released yet, but he's from Mount Morris, Michigan.
Four other vehicles were struck with large rocks or concrete chunks.
