Three Latin American investors who claim they lost millions of dollars to convicted Ponzi schemer Bernard Madoff are suing a French bank, accusing its employees of being ill-informed and providing them with poor financial advice.

BNP Paribas is accused of failing to protect clients’ investments by advising them to stay with a hedge fund that turned out to be a feeder fund for Madoff’s $65 billion Ponzi scheme, the world’s largest uncovered to date.