An unidentified man's body was found Friday in the water at the edge of the Arkansas River bank just south of Lock and Dam 5 in Jefferson.
The Jefferson County sheriff's office Criminal Investigation Division is investigating the death.
At approximately 5:11 p.m., sheriff's deputies were dispatched to an area off of Bartlett Road, where fishermen found the body.
"When investigators arrived, they did not find a source of identification, so they are working to identify the deceased and make notification to the next-of-kin," said Jefferson County sheriff's Maj. Gary McClain.
"There were no obvious signs of foul-play, leading investigators to believe that the death is either medical or drowning-related.
The Coroner's Office pronounced the male deceased and the body will be sent to the Arkansas State Crime Lab for an autopsy to determine the cause and manner of death."