The New York Post reported Tuesday that prosecutors in the United States will drop the charges against ex-IMF chief Dominique Strauss-Kahn when he again appears in the court in two weeks, or earlier, because the credibility of the alleged victim is highly doubted.

The New York Post cited an unnamed top investigator in the case who assured the eventual dismissal of charges "a certainty."

"We all know this case is not sustainable," The New York Post quoted its source as saying.

"Her credibility is so bad now, we know we cannot sustain a case with her," the source told the newspaper, referring to the Guinean hotel maid who accused Strauss-Kahn of trying to rape her in a luxury hotel in Manhattan.

A judge released Strauss-Kahn from house arrest and lifted strict bail conditions Friday, although serious charges including sexual assault and attempted rape remain in place against the man once seen a top French presidential contender.

"She is not to be believed in anything that comes out of her mouth -- which is a shame, because now we may never know what happened in that hotel room," said the source quoted by The New York Post