The Metropolitan Police Service's Police Central e-Crime Unit (PCeU) has arrested a man for committing online banking fraud.
A 37-year-old man from Belvedere in Kent was arrested in connection with computer misuse offences.
It follows a recent study from the UK Cards Association, which said that technology had helped to significantly reduce the amount of money lost through credit and debit card fraud to an 11-year low.
An unnamed high street bank had reported to the police that online accounts had been compromised over an 18-month period. The PCeU carried out an investigation which found that accounts had been accessed without authority, money stolen and personal details had been changed.
The police seized computer equipment from the suspect's address, and will now be examining the devices. The man has been taken into custody at a south London police station.
Detective Inspector Mark Raymond at the PCeU said: "Online crime is never victimless. Such offences are indiscriminate and will be fully investigated where allegations are made.
"Online banking is generally very safe providing individuals keep their operating systems and anti-virus software regularly updated to avoid online hackers and fraudsters. Sound independent advice can be found at 'getsafeonline.org'."