Stevens Point police are investigating a counterfeit operation in Amherst after local businesses and banks received fake $20 bills.

Detective Kent Lepak says no arrests have been made yet, but he thinks the manufacturing of money has stopped. He would not say how many people are suspected to be involved in the counterfeit operation.

Lepak says police have seized a printer/copier scanner, fake currency and other evidence.

He says the investigation began Nov. 6 after a local business used detector pens to spot fake bills and gave authorities the license plate number of someone involved in passing them.

Lepak says the bills were made by scanning currency and printing it on basic paper.

Investigators believe the bills were passed at at least three stores in Stevens Point and Plover.