At least six more Swiss and one Liechtenstein private bank have come under the gaze of US prosecutors investigating whether Swiss bankers helped rich Americans dodge tax.
Latest court documents show how US authorities' investigations that started with UBS in 2007 have mushroomed to include a swathe of the country's financial sector, the Financial Times reports.
No other banks have yet been named. However, US investigators generally began by prosecutions of taxpayers with undeclared Swiss accounts, then indicted Swiss bankers and specialist advisers, followed by investigations into specific banks.
The latest information stems from indictments of a Zurich accountant allegedly specialising in forming sham offshore companies and foundations, and two former UBS bankers who left after the latter's decision to close its US business in 2008.
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