MOUNT COMFORT, Ind. (AP) – Three state highway workers cleaning up litter picked up a tire – and found about $100,000 inside.

Indiana state police suspect the cash may be drug money. State Police spokesman Mike Burns says a drug-sniffing dog found the scent of drugs on the bills.

Detective Sgt. Keith O’Donnell commended the workers for their “honesty and professionalism” in contacting police.