The plane which took off from Tehran landed overnight at Diyarbakir airport and searches took place Sunday, broadcaster CNN Turk said.
Last Tuesday night another plane was similarly forced to land at Diyarbakir but departed the following day after a search squad trained in chemical, biological, radioactive and nuclear cargo found nothing illegal.
Turkey’s Foreign Ministry and airport authorities declined to comment. A ministry spokesman said after last week’s plane grounding the search was routine.
Turkish media suggested the plane may have been stopped at the request of the United Nations to investigate whether it was carrying nuclear material.
The U.N. nuclear watchdog is probing allegations of covert atomic activities in Syria. Iran and Syria, close allies, deny ever harboring nuclear weapons ambitions.
(Reporting by Alexandra Hudson)
