Topeka ? A walk along the Kansas River in Topeka turned interesting for one hiker, who found a fragment of a human skull, said Sgt. Daniel Lotridge of the Shawnee County Sheriff’s Office.

The hiker found the remains Tuesday on a sandbar on the river near the intersection of U.S. Highway 75 and Interstate 70.

Lotridge said the bones did not belong to Michael Zapletal, a 9-year-old Maple Hill boy who was swept away in the current of the Kansas River in August 2007 and never surfaced. The Sheriff’s Office did contact the Zapletals to inform them that the bones had been found.

The skull fragment is believed to be of Native American origin, but the office is sending it to a forensic lab at Kansas State University for testing. The Shawnee County coroner does not believe the bones are prehistoric.