Teenagers charged after rock kills van passenger in Michigan

Image source, Genesse County Sherrif's Office

Image caption, One of 20 rocks found on the highway after the incident

Five teenagers have been charged with second-degree murder in Michigan after a rock thrown from a highway overpass killed a man in a passing van.

The 6lb (2.7kg) stone smashed through the vehicle's windshield and struck Ken White, 32, US media report.

The suspects, aged 15 to 17, later drove to a McDonald's restaurant to eat, a sheriff said.

They were each charged with one count of second-degree murder, as well as conspiracy to commit murder.

"I don't believe that this was a deliberate attempt to take somebody's life," Genesee County prosecutor David Leyton was .

"It was a wilful and wanton act that resulted in somebody's death."

At least 20 rocks were found on Interstate 75, including one weighing almost 20lb, and at least four vehicles were damaged.