Three Americans were arrested while hiking in Iran last July, according to BBC News.
Iranian government accused Sarah Shourd and two American men of being spies, not just hikers, CNN reported.
Tehran has charged the hikers with spying and have scheduled a trial for Sunday, BBC News reported.
The three Americans were hiking along the border of Iraq and accidentally strayed, which is causing much trouble.
The hikers said they did not mean to cross the border.