Iran confirms prisoner exchange 'negotiations' with US
Iran's foreign ministry spokesman Saeed Khatibzadeh said Monday that Foreign Minister Mohammad Javad Zarif had "put forth a plan to swap all Iranian and American prisoners", state news agency IRNA reported.
"Biden's administration also considered this issue from the first day" in office, he added.
The remarks came as Iran has engaged in talks with world powers in Vienna on reviving its 2015 nuclear deal.
The agreement, which limited Iran's nuclear programme in exchange for international sanctions relief, has been on life support since former US president Donald Trump withdrew from it in 2018 and reimposed sanctions.
Arrests of foreigners in Iran -- especially dual nationals who are often accused of espionage -- have increased since then.
Tehran and Washington have held indirect negotiations in the Austrian capital since early April.
The two countries in May denied having concluded a prisoner exchange deal, following reports that an agreement was made on the sidelines of the Vienna talks to release four prisoners from each side.
The most prominent exchange between them came in 2016, months after the nuclear deal was clinched, with four Americans released in exchange for seven Iranians.