The unidentified man, arrested by Iran's intelligence service, said he had travelled to Israel for meetings with Mossad operatives.
"There were two new men that I met, two Israeli officers who knew Hebrew perfectly," the man told the camera. "We arrived at the airport in Tel Aviv and at passport control I was asked a question and since I didn’t know Hebrew it aroused the suspicion of the official."
"At that moment, the person responsible for me came and presented a ticket, took my passport and we went a different way," he said. "We exited Tel Aviv on the highway towards Jerusalem and after half an hour arrived at Mossad headquarters, which is located on the main road between Tel Aviv and Jerusalem."
The man described what he assumed was "Mossad headquarters": A building surrounded by a 3-4 kilometer long wall and encircled by an electric fence.
He also described how, allegedly, the Mossad assassinated Iranian nuclear scientist Masoud Ali-Mohammadi.
The man said that Israeli agents trained him in surveillance, counter-surveillance and how to stick a bomb under a car. He also said he learned how to use a motorcycle bomb.
The man went on to describe how he was supposedly asked to assassinate Ali-Mohammadi.
"At the headquarters near Tel Aviv, I was trained and I received precise details on Dr. Al-Mohammadi and the surroundings of his home, so that I would be completely familiar with the area and the operational conditions of the assassination."
Earlier on Monday, Iranian media reported Iran had arrested a spy network linked to the Mossad.
A remote-controlled bomb killed Ali-Mohammadi, a scientist at Tehran University on Jan. 12 last year.
In November, an Iranian nuclear scientist was assassinated and another seriously wounded in parallel hits in Tehran. All three attacks were blamed by Iranian authorities on the Mossad, as well as the British MI6 and American CIA.
The assassinations embarrassed the Iranian regime and security officials vowed to find the perpetrators.
Monday's announcement and television interview appear to be an attempt by Iran's government to show its public that it succeeded at least partially in that mission.
