Prince William County police are investigating a fatal hit-and-run Thursday in Triangle.

Police responded to the 18400 block of Woodland Drive about 10:20 a.m. A man was found unconscious in the road, and police think he had been hit by a vehicle that then fled. He later died at an area hospital.

The victim was identified as Joseph P. Lyons, 59, of Triangle. Investigators don’t have any information on the vehicle that struck him.

Tipsters are urged to call Crime Solvers at 703-670-3700 or 1-866-411-TIPS.