U.S. investigates Citigroup's dealings with Carlos Hank's companies

The U.S. Justice Department is looking into Citigroup Inc.’s dealings with companies linked to Mexican billionaire Carlos Hank Rhon as part of an expanding investigation into the bank’s money-laundering controls, Bloomberg News reported.

According to documents reviewed by Bloomberg, U.S. officials asked Citigroup to provide information on accounts tied to four businesses affiliated with Hank Rhon, among them Grupo Financiero Interacciones SA and Grupo Hermes SA.

So far Hank Rhon, a businessman involved in banking, construction and heavy industry, has not been accused of any wrongdoing. A spokesman for his companies said the firms weren’t the targets of the investigation.