U.S. Treasury officials have told American banks to closely monitor transactions that may be related to unrest in Libya, for any signs that state assets were being misappropriated.
An advisory issued by Treasury's Financial Crimes Enforcement Network directs financial institutions to monitor accounts of senior political figures that might contain the proceeds of bribery or other illegal payments.
The directive about Libya follows similar instructions from the U.S. Treasury Department about transactions involving Egypt and Tunisia.
Some information for this report was provided by Reuters.