U.S. authorities have widened their hunt for Americans suspected of evading taxes by hiding assets and income in offshore bank accounts.
Federal judges approved special summonses aimed at getting account data and identifying information of American banking clients of Switzerland's Zurcher Kantonalbank and Bermuda-based N.T. Butterfield & Son, prosecutors said Tuesday.
The two banks, which could not immediately be reached for comment, don't have U.S. operations. So investigators got authorization to serve the summonses on four U.S. banks and one London-based bank where Zurcher Kantonalbank and N.T. Butterfield maintained correspondent accounts to service U.S. clients.