ROCHESTER — Rochester police say they’ve uncovered evidence of a counterfeit money operation.

Four people were arrested over the weekend after officers obtained a search warrant for a home. Police say officers had gone to the home to serve a felony warrant and discovered evidence of the money-making operation. Police have not yet provided details on what was seized.

Reports of counterfeit bills have surfaced recently in Rochester, Austin, Albert Lea, Red Wing and Byron.

In early September, Wal-Mart in Rochester received $260 in counterfeit $20 bills in one transaction.