Iran said it had agreed on "some points" in talks with the UN nuclear watchdog on Wednesday and that the two sides would meet again, Iranian media reported, indicating that they had again failed to finalise a long-sought deal.
The International Atomic Energy Agency (IAEA) had hoped to bridge persistent differences with Iran preventing the Vienna-based U.N. agency from restarting a stalled investigation into suspected nuclear weapons research by Tehran.
Iran's ambassador to the IAEA, Ali Asghar Soltanieh, suggested in comments to Iranian media that some progress had been made in the meeting in Tehran, without giving details.
There was no immediate comment from the IAEA.