YANKTON, S.D. (AP) — Yankton police are still searching for the owner of a wedding ring that was found in the city's sewer system in June.

The ring was discovered in sludge at the city's wastewater plant. Authorities say it might have been in the sewer system for years before making its way there.

Police Lt. Todd Brandt tells the Yankton Daily Press & Dakotan that an expert has examined the ring and believes it originated from Meredith's Jewelry in Yankton.

Brandt says the police department has received inquiries about the ring, but its owner remains a mystery.

Police say the ring has some unique characteristics, and a person will need to give a detailed description of the ring or have a photograph of it to claim the piece of jewelry.

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 This material may not be published, broadcast, rewritten or redistributed.