Iran has dropped espionage charges that had been laid against an Iranian-French academic detained in the Islamic republic since last year, her lawyer said.
"The espionage charge has been dropped" for Sciences Po University academic Fariba Adelkhah, Said Dehghan said.
The lawyer welcomed the decision to lift the charge which carries the death penalty.
Ms Adelkhah still faces two other charges: spreading "propaganda against the political system" of the Islamic republic; and "conspiracy against national security".
The lawyer said the prosecution had dropped its case against her for "disturbing the public order".
Australian Kylie Moore-Gilbert remains behind bars in Iran. Source: Supplied
Ms Adelkhah, an expert on Iran and Shiite Islam, was arrested in Tehran in June last year.
Her Sciences Po colleague Roland Marchal was arrested in the same month while visiting Ms Adelkhah.
Iran does not recognise dual nationality and has repeatedly rebuffed calls from foreign governments for consular access to those it has detained during legal proceedings.
It accused France of "interference" in December after the French foreign ministry summoned Iran's ambassador to Paris to protest the imprisonment of Adelkhah and Marchal.
Their detention added to distrust between Tehran and Paris at a time when French President Emmanuel Macron has been seeking to play a leading role in defusing tensions between Iran and the United States.
The French pair are not the only foreign academics behind bars in Iran.
Australian Kylie Moore-Gilbert of the University of Melbourne is also imprisoned in the country.
The Prime Minister Scott Morrison when she reportedly began a hunger strike on Christmas Eve after losing an appeal against a 10-year jail sentence.
