A SOPHISTICATED "skimming gang" is successfully stealing banks details from ATMs across NSW, police have warned.
An investigation into the installation of skimming devices at 15 ATMs in Sydney, revealed tens of thousands of bank accounts could have been compromised and many more machines could still be tapped.
Detectives from Strike Force Bournemouth believe gang members install a device which copies card details and films victims entering their personal identification numbers.
Compromised card details are copied on to blank cards and the stolen PINs used to make purchases and withdraw money from the victims' accounts.
Detectives allege some stolen funds have already been remitted to Romania, where the crime gang is believed to have originated.
One man was arrested by police this week after an alert money transfer officer became suspicious and contacted detectives.
The Romanian national was charged with fraud offences and remanded in custody until his next court appearance on September 10.
Police have released CCTV of several people they want to speak to.Fraud and Cyber Crime Squad Commander, Detective Superintendent Col Dyson, said fraudsters were becoming more sophisticated in the way they targeted consumers.
He said the new skimming devices were difficult to detect and warned customers to always cover their PIN and check their card statements for any irregular activity.
"We are working closely with financial institutions and money remittance outlets that have provided vital information to investigators to date," Det Supt Dyson said.
"The banks are very proactive in this area and have sophisticated software to assist with the detection of ATM skimming and information can be disseminated to the police almost immediately.
"It is only a matter of time before further arrests are made."