Courtroom sketch showing Jeffrey Epstein at his bail hearing in New York on July 15th, 2019.

Jeffrey Epstein, an accused child sex trafficker, is appealing a federal judge's decision to deny his proposed bail package, which left the wealthy financier in jail pending trial.

The move Monday came four days after Judge Richard Berman rejected Epstein's bid to to be released on a bond of up to $100 million.

Berman said Epstein posed a danger to the public and represented a serious flight risk. "I doubt any bail package could overcome" Epstein's "dangerousness," the judge said at Epstein's bail hearing Thursday.

Epstein is currently being held in federal lockup in lower Manhattan. His lawyers notified Berman late Monday afternoon that they were appealing his decision to the U.S. Court of Appeals for the Second Circuit.

The criminal notice of appeal form, which costs $505 to file to the court clerk, does not lay out the grounds for appeal that Epstein's lawyers plan to cite.

Epstein, 66, is a former friend of Presidents Donald Trump and Bill Clinton. He is accused in U.S. District Court in Manhattan of sexually abusing dozens of underage girls between 2002 and 2005 at his New York City and Palm Beach, Florida, mansions.