A driver in New Orleans apparently hit a pedestrian in the city's French Quarter and then drove on, dragging the body for more than six miles.
Police said the driver drove across a Mississippi River bridge before the body was dislodged.
Another driver found the disfigured body of a man in the early hours of Friday in the road leading from the bridge.
In a Facebook posting, police said investigators believe the body is that of an unidentified pedestrian hit in the French Quarter. It said witnesses told investigators a black car with tinted windows struck the man and drove off.
Officer Garry Flot, a police spokesman, said do not have further leads to the car or driver.
Police posted surveillance video photographs of the car on Facebook, seeking the public's help in the case.