According to Sgt. Thomas Miller of the Warren Police Department, they are investigating several instances of counterfeit $100 bills being circulated in Warren. Sgt. Miller indicated that the department has leads and are investigating. He went on to caution local citizens and merchants to be aware of this occurrence. The Warren PD asks the public to be particularly aware of anyone trying to purchase things valued at small amounts and trying to pay with a $100 bill. If persons suspect anything like this, please contact the Warren Police Department immediately.