In response to an extensive Wall Street Journal inquiry, the Royal Bank of Scotland has shared that it has managed to uncover some "potential irregularities" with its Chinese small and medium- sized enterprise banking facility.

While the scale and nature of the problems discovered at ABN Amro China are still unclear, RBS has said that it is looking into the issue seriously. One of the biggest foreign banking facilities in China, AMB Amro has 18 retail banking outlets across China.

"As a result of an internal investigation, we have identified potential irregularities involving a very small number of accounts within our SME banking business in China. We took immediate action to notify the relevant authorities and further investigations are underway", said an ABN Amro China spokeswoman.

The spokeswoman refused to disclose any more details, stressing that the bank is still investigating, and any dishonest behavior on behalf of the bank staff is "completely unacceptable".

While the probe is going on, the bank has rolled-out various enhanced measures to ensure that the clients' accounts are safe.