Iranian foreign ministry spokesman Saeed Khatibzadeh said during a press briefing on Monday that talks in Vienna on reviving the 2015 nuclear deal between Iran and world powers have made significant progress. But Khatibzadeh said nothing is agreed until everything is agreed at the Vienna negotiations, as the remaining issues are the hardest.

Last Saturday, the Iranian Foreign Minister said Tehran is ready to swap political prisoners with the US, adding that all nuclear negotiations will soon succeed if Washington makes the necessary political decisions.

Source: VOV5