The United States and Iran are set to hold indirect talks in Austria as part of efforts to salvage the 2015 nuclear deal between Tehran and world powers.
The talks are scheduled for Tuesday in Vienna through intermediaries including the European Union.
The accord has been in limbo since the administration of former President Donald Trump withdrew the US in 2018 and resumed sanctions on Iran. Tehran responded by accelerating nuclear development.
The two countries have been at odds over how to lift the sanctions and limit Iran's nuclear program.
The US and Iranian delegations will not hold direct talks but will separately talk to mediators with the aim of achieving a breakthrough in negotiations.
In an interview with NHK, a high-ranking Iranian government official revealed that Tehran has received a proposal from the US side on how to move forward.
The official stressed the importance of both sides setting a timetable to carry out the steps needed to revive the deal.
Military tensions between the US and Iran have heightened since Washington pulled out of the accord. The Vienna talks could mark a step toward mending the strained relationship and bringing the deal back on track.