Human remains located along the Elkhorn River on Tuesday evening aren't those of a missing Norfolk man washed away by a flash flood in Norfolk, the Stanton County Sheriff’s Office said.

The skeletal remains, found southwest of Stanton, are believed to have been washed out of the Elkhorn River during recent flooding, and appear to have been in the water for an extended period of time, the Sheriff's Office said.

A ground search of the area was conducted Wednesday, officials said. The investigation will continue with the assistance of forensic experts and could take weeks or months, officials said. 

The missing Norfolk man is Scott E. Goodman, 30, who was seen standing on his car and then being carried away by a surge of water.

Stanton is about 12 miles southeast of Norfolk.