The Metropolitan Police has held arrested London-based teenagers on suspicion of being members of a cybercrime gang.
The gang are alleged to have stolen thousands of credentials from credit cards used online.
According to the Scotland Yard and the Police Central e-Crime Unit (PCeU), the youths were involved in one of the largest English-based online cyber criminal forum and are being held on suspicion of conspiracy to commit fraud and contravening the Computer Misuse Act.
They are alleged to be members of a cyber crime forum of more than 8,000 members, all involved in the trading of malware, giving cybercrime tutorials and stealing bank details, personal information, bank account numbers, PINs and passwords.
According to the information revealed by PCeU, nearly 65,000 compromised cards have been recovered by the law enforcement agents.
"Today's arrests are an example of our increasing effort to combat online criminality and reduce national harm to the UK economy and public," said Detective Chief Inspector Terry Wilson of the PCeU.