Iran's foreign ministry spokesman said on Monday that a prisoner swap with the United States was on the agenda in parallel with the nuclear talks in Vienna.
"This issue is currently on the agenda in parallel with the Vienna talks.... But it seems that the US has not made a decision on it. Perhaps it is waiting for the results of the talks," said Saeed Khatibzadeh.
On Thursday, Russian Foreign Minister Sergei Lavrov said there was still a long way to go before the 2015 deal could be revived. Iran's nuclear advances were curbed in exchange for the loosening of US and other economic sanctions.