Iran’s prosecutor-general Mohammad-Jafar Montazeri says since Tehran and Washington have no treaty on the expatriation of prisoners, such exchanges should be done through diplomatic channels. 

In response to a question about earlier remarks by the country’s foreign ministry spokesman, who had expressed Iran’s readiness for prisoner swaps as part of the agreement to revive the 2015 nuclear deal, he did not rule out such a possibility. 

“We have a duty to follow up on the problems of our citizens anywhere in the world and support them, but relations between countries can be very effective in this field. The level of relationships and the quality of relationships are effective in this field,” he said.

He noted that such exchanges work much more easily with Islamic countries and neighboring countries, especially with countries with whom Tehran has agreements in this regard, but “these relations and contracts do not exist with a country like the United States, and things must be done diplomatically.”

Earlier in the month, foreign ministry spokesman Nasser Kanaani said Iran is ready for swift agreements for prisoner swaps with the US, regardless of the result of talks to restore the JCPOA.

A few days earlier, the spokesman for the Iranian parliament's National Security and Foreign Relations Committee Mahmoud Abbaszadeh Meshkini said, "I don't know specifically whether there is going to be an exchange of prisoners between Iran and the United States, but in international relations this is customary and it is not unusual for some prisoners to be exchanged between the two countries.”