The semi-official Tasnim news agency quoted judiciary spokesman Gholamhossein Esmaili on Tuesday as saying the three had been charged in two separate cases. He said two Australians, likely the blogging couple Mark Firkin and Jolie King, had been detained over using a drone to take pictures and video of military areas and other unauthorized zones.
He said the other Australian faced charges of spying for another country, without elaborating. That's likely an as-of-yet-unnamed Melbourne academic. Australia said last week it was pressing Iran to free those held.