Qatar National Bank is investigating a security breach that appears to have exposed sensitive personal data for what could be hundreds of customers, including employees of international broadcaster Al-Jazeera and potentially senior government officials. Four people identified in the files and reached by The Associated Press confirmed their personal information was authentic. It is unclear if all of the data posted online originated from the bank itself. The bank said it was coordinating with the concerned parties to investigate the matter and offered its assurance that there would be no financial impact for its clients or the bank.