"I have met the three clients and Sarah Shourd is likely to be released (within the following days)," Shafiei told ISNA.

Also, Dolatabadi said Sunday that the release of one of the U.S. hikers has nothing to do with the case of Iranian scientist Shahram Amiri.

"We do not make any link between the two issues, Iranian judiciary fulfills its missions and only focuses on judicial issues," said Dolatabadi according to ISNA.

In June, the 32-year-old Iranian scholar Shahram Amiri, who once worked at Iran's Malek Ashtar University and was missing on a pilgrimage in Saudi Arabia last year, arrived at Tehran's Imam Khomeini airport from the United States.

Media reports said that the scholar was released by the U.S. to exchange for the three American hikers, which was rejected by Iran.

Iran charged the three Americans with espionage last November, but the U.S. government considered the allegations totally unfounded and insisted that they should be freed.

In May, mothers of the three Americans were allowed by the Iranian government to meet their children in Tehran.