The International Atomic Energy Agency (IAEA) says it is planning to restart talks with Iran about investigating its disputed nuclear program.
IAEA spokeswoman Gill Tudor said on April 22 that the two sides were discussing possible dates for the meeting.
She did not confirm Iranian media reports that a meeting would take place on May 21 in Vienna.
In their last talks in February, the two sides failed to reach an agreement on the ground rules for any IAEA investigation in Iran.
At the time, the UN nuclear watchdog said more time was needed to reflect on the way forward, adding that a fresh round of talks would make no sense.
Iran has rejected concerns voiced by the IAEA and the international community, saying its nuclear program is designed for civilian purposes only, not to attain nuclear weapons.
Based on reporting by AFP and dpa