Ahmad Rafat, who is also a reporter for Voice of America, had his press pass confiscated and was barred from entering the UN Food and Agricultural Organization's (FAO) premises on June 3. Visiting Iranian President Mahmud Ahmadinejad was due to hold a press conference at the event later the same day.
The Iranian-born Rafat believes the FAO barred him from attending the event at the request of the Iranian government.
The case has raised concerns about whether the Iranian government was essentially allowed to censor the international press.
The FAO later admitted Rafat to the summit, but only after Ahmadinejad had left the grounds. The FAO's director of communications, Nick Parson, offered an apology, saying the organization was "extremely satisfied" that the issue had been resolved.
But many questions remain, including why Tehran might be so concerned over a single reporter's presence at a public event and how such concern could translate into security guards at a UN facility turning the reporter away.
Radio Farda is a U.S. Congressionally funded joint venture between RFE/RL and Voice of America that broadcasts in Persian to Iran.
'You Cannot Enter'
Rafat says the trouble began when he arrived at the FAO building to begin a day of summit coverage that was to include attendance at Ahmadinejad's press conference. He showed his official press accreditation for the summit, submitted his bags for inspection, and walked through the metal detector.
"On the other side, there was a gentleman from the Italian police who was looking at a piece of paper in his hand and looking at me. He told me, 'You cannot enter,'" Rafat says. "I asked why, and he said the FAO did not want it. Then, after checking my ID, he said, 'I must ask you to leave the building.'"
When Rafat protested, Italian police explained that the UN building has extraterritorial status and, although they provide security, all decisions over who comes and goes are entirely the FAO's to make.
Rafat, who is also deputy director of the biggest private news agency in Italy, Adnkronos, immediately alerted the media. He said he was shocked at his exclusion.
So were those who heard about it.
"Some 60 politicians released communiques supporting me and condemning the decision of FAO," Rafat says. "After that came statements from the Italian association of the press, the Foreign Press Club in Rome, the trade union of Italian journalists, and the International Federation of Journalists in Brussels."
'Gravest' Of Mistakes
European Parliament Vice President Mario Mauro criticized the incident as the "gravest" of mistakes and said it risked giving the impression that an undemocratic country was imposing its will upon the international community.
Demonstrators outside the FAO summit in Rome (AFP)