UN nuclear agency and Iran work to extend monitoring
IAEA director general Rafael Grossi announced on February 21 the two sides had struck a three-month technical accord "to maintain a necessary level of surveillance and verification".
The accord runs out soon and European nations involved in the negotiations in Vienna have called for it to be continued.
The European Union has talked up hopes the negotiations, also involving Russia, China and the United States, can succeed.
Indirect negotiations between Washington and Tehran have been going on in the Austrian capital since early April, with the other five countries signatory to the deal acting as intermediaries.
Iran has also said the talks are moving in the right direction.
The parties are due to convene again in the Austrian capital early next week.
President Joe Biden wants to revive the deal, and for that to happen the United States and Iran must agree on the lifting of the sanctions reinstated by Trump and on Tehran's commitment to follow the terms of the agreement.