YANKTON - Authorities are investigating the death of a 23-year-old man whose body was found on a highway east of the city of Yankton.

The Yankton County Sheriff's Office says a preliminary investigation indicates that Joseph Bret Jackson of Yankton was killed in possible hit and run early Friday morning.

The body was found shortly before 4 a.m. Friday.

Sheriff Jim Vlahakis tells the Yankton Press and Dakotan that no witnesses of the incident have come forth.

Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

More From KXRB