Huffington Post reports: No business can operate without bankers — not even the bribery business.

British financial giant HSBC and American bailout kingpin Citibank processed transactions, managed money and vouched for Unaoil, a once-obscure firm that is now at the center of a massive international corruption scandal. Police raided Unaoil’s Monaco offices and interviewed its executives on Thursday, a day after The Huffington Post and Fairfax Media first exposed the company’s practices. Law enforcement agencies in at least four nations are involved in a wide-ranging probe of the company and its partners.

Halliburton, KBR and other corporate conglomerates relied on Unaoil to deliver them lucrative contracts with corrupt regimes in oil-rich nations. But without the help of banks like HSBC and Citibank, none of Unaoil’s operations would have been possible. [Continue reading…]