An organised crime gang with links to eastern Europe is suspected of targeting more than 40 ATMs across Sydney and skimming thousands of dollars from unsuspecting customers.

Detectives have released CCTV footage of three men, shown at ATMs on Market Street in Sydney and in Campsie, who are wanted for questioning following a sharp rise in skimming incidents across the city since mid-January.

Detective Superintendent Arthur Katsogiannis, the commander of the Fraud and Cybercrime Squad, said the gang was suspected of fitting skimming devices to more than 40 Sydney ATMS and installing a tiny video camera to record people entering their PINs.

The suburbs where skimming devices have been found include Artarmon, Avalon, Balmain, Bexley, Bondi Junction, Burwood, Campsie, Caringbah, Chatswood, Clovelly, Dee Why, Double Bay, Dural, Gordon, Hurstville, Haymarket, Kingsford, Mona Vale, Mosman, Neutral Bay, Parramatta, Ramsgate, Rockdale, Seven Hills, Strathfield, St Ives and the Sydney CBD.