The DOJ has also issued subpoenas to employees of some major US banks, according to the Bloomberg report, which added that Swiss banks were included in a wave of subpoenas issued before the UBS acquisition of Credit Suisse.
The Justice Department’s investigations are aimed at determining which bank employees dealt with sanctioned customers and how those customers have been vetted in recent years, Bloomberg said.
The bankers could be further investigated to determine if they broke any laws, the note added.
Credit Suisse and UBS declined to comment, while the DOJ did not immediately respond to email requests from Reuters.
The Justice Department has been trying to pressure Russian oligarchs through sanctions, asset forfeitures and criminal investigations to stop supporting Russian President Vladimir Putin following the country’s invasion of Ukraine.