Santander has said no money was ever at risk and no member of staff was involved in the foiled plot to steal millions from the bank's branch in Surrey Quays, south-east London.
Like all high street banks, Santander works very closely with the police and other authorities to help prevent fraud.
Through this co-operation, Santander was aware of the possibility of the attack connected to the arrests. The attempt to fit the device to the computer in the Surrey Quays Branch was undertaken by a bogus maintenance engineer pretending to be from a third party.
– Santander spokesman
It failed and no money was ever at risk. No member of Santander staff was involved in this attempted fraud. We are pleased that we have been able, through the robustness of our systems, to prevent the fraud and help the police gather the evidence they needed to make the arrests.