As a result, she was denied entry, it added, without specifying whether or not anything had been found in her possession.
The Iranian organisation said it had reported the incident to International Atomic Energy Agency and notified it that its inspector’s accreditation had been withdrawn.
She had since left Iran for Vienna, where the IAEA is based, it said, without saying when.
“Iran’s representative to the IAEA will present a full report on the matter” in Vienna later Thursday, it added.
According to a source close to the IAEA, the 35 members of its council of governors will hold a special meeting dedicated to Iran.
Under a landmark 2015 deal between Iran and major powers, its nuclear facilities are subject to continuous monitoring by the IAEA.