US securities regulators could file an enforcement action against hedge fund manager Philip Falcone as soon as this week, according to reports. The US Securities and Exchange Commission recently authorised the filing of a lawsuit against Falcone, who notified investors in his Harbinger Capital Partners fund about a year ago that he was being investigated by regulators, Bloomberg reported. SEC officials did not comment. Falcone could not be reached for comment. Matthew Dontzin, an attorney for Falcone, issued a statement saying the manager would fight any lawsuit.