Cashpoint users in Exeter are being urged to be on the alert after 'suspicious devices' were recovered from ATMs in the city centre on Saturday.
The devices were hidden inside the dispensers to physically stop the money from coming out.
Members of the public noticed the abnormality and called police.
Officers are also warning that fake 20 and 50 pound notes have been seen in Exeter - with fraudsters typically paying for low-cost items with them to get large amounts of change.
'Russian spy' report leads to extra harbour training
Torbay harbour staff to receive more training
Lib Dems snap up another East Devon seat
They win Seaton by-election
Torbay robots programmed for hedgehog safety
Mowers are out during the day
Fire funding gap could hit £12m if council tax frozen
Documents show a range of funding deficits over five years
MPs join row over Tamar toll increases
Plymouth's three MPs urge a rethink
EV charger investment in Tavistock
There will be seven stations at Kilworthy Park
