Foreign Ministry spokesman Hamid-Reza Asefi said the Islamic Republic had demanded an explanation from Amman after summoning Jordanian charge d'affaires to Tehran Saturday evening and lodging an official complaint.

"Jordan must not act like this with the individuals who have no base in Iran. We consider this measure as unacceptable since it has negative effects (on the two countries' ties)," he added.

Another protest letter had been lodged by the Iranian embassy in Amman, the official told reporters during his weekly news briefing.

The protest came after Farah Diba, the widow of Mohammad Reza Pahlavi who was ousted by the Islamic Revolution in 1979, attended the wedding ceremony in Amman on Thursday.

It also came after Iran sternly admonished Spain last Sunday for inviting the son and widow of the defunct shah to the wedding of Crown Prince Felipe.

"These individuals have no place not only among our people, but among other people around the world and the Spaniards will realize later that the individuals invited are not used as delegates in any such ceremonies," Asefi said last week.

Iran's 'Peacock Throne' was overthrown following the 1979 Islamic Revolution, which was led by late Imam Khomeini and forced Mohammad Reza Pahlavi to flee.

He died one and a half years later after being denied asylum by one after another government, including by his own closest ally -- the United States.