The International Atomic Energy Agency (IAEA) has decided to close the file relating to nuclear material at an undeclared site after receiving a "possible explanation" from Iran, according to a report seen by AFP Wednesday.
The UN nuclear watchdog "has no additional questions... and the matter is no longer outstanding at this stage", the report said of the site at Marivan in Abedeh county.
The IAEA had reported the discovery of traces of radioactive material at three sites not declared by Iran, in a blow to efforts to restore a landmark 2015 deal between Tehran and major powers.