An early morning crash on Route 28 in Prince William County killed four people and injured five others Saturday, according to county police.

Those killed all were occupants of a Dodge Intrepid that police believe might have been involved in an earlier hit-and-run accident close to a nearby restaurant, Prince William County Police Department spokesman Officer John Bogert said. The bodies of the two men and two women, who were pronounced dead at the scene, had not been identified as of Saturday afternoon.