The French government demanded on Saturday that Iran immediately release French teaching assistant Clotilde Reiss and Tehran embassy staff member Nazak Afshar, saying espionage accusations against them were baseless, Reuters reported.
An Iranian court has charged the women and dozens of others of spying and aiding a Western plot to overthrow clerical rule.
"After Clotilde Reiss' appearance before a court in Teheran, France renews its demand for the immediate liberation of the young academic, since the accusations against her are baseless," France's foreign ministry said in a statement.
It said it was also demanding Afshar be freed. France also protested against the conditions of the women's court appearance.