A hedge fund services unit of Citigroup in Bermuda has become the latest in a line of third-party middle- and back-office service providers to be sued by the trustee liquidating Bernard Madoff's firm to recoup collect funds for disgruntled investors.

The unit, called Citi Hedge Fund Services Ltd. of Bermuda, was the fund administrator for the Kingate Global Fund Ltd. and Kingate Euro Fund, feeder funds that invested in Madoff's Ponzi scheme. Madoff is now serving a 150-year sentence in a federal prison after he plead guilty to fraud.

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