ENID, Okla. (AP) -- Enid police say counterfeit $10 bills have been used at three businesses since last week.
Sergeant Eric Holtzclaw says the bogus bills were used at a Wal-Mart, a convenience store and a pizza restaurant.
Holtzclaw says police have questioned a man about the fake bill used at the convenience store. The man told investigators he didn't know where he got the phony money.
Holtzclaw says police are working with the US Secret Service in the investigation.