(CNN) -- More than 150 Iranian members of parliament have signed letters advocating the prosecution of former presidential candidate Mir Hossein Moussavi, state media reported Saturday.
Mohammad Taghi Rahbar, the head of parliament's clerical faction, said lawmakers who have signed the two letters of complaint against Moussavi have done their "duty, which was to defend the integrity of the system" and filed complaints against the leaders of what he called a "conspiracy," official news agency Iran Newspaper's Web site (INN) reported.
"People want to see the convictions of the leaders of the conspiracy, because they are rioters and have abused the peoples' lives and property," he said, according to INN.
The letter come after Moussavi, the Iranian opposition leader and symbol of anti-government fervor, lashed out against Iranian authorities last week, saying remnants of the "tyranny" and "dictatorship" that prevailed under the toppled Shah of Iran's regime persist today.
"In the early years of the Islamic Revolution, most people were convinced that the structure of the revolution would destroy the past political situation of tyranny and dictatorship, and I was one of them who believed that," said Moussavi, a former prime minister.
But, he said, he no longer believes that.
"I don't believe that the revolution achieved its goals," said Moussavi, speaking out forcefully, as the tensions over Iranian politics continue.
Iran's hard-line regime is marking the anniversary of the shah's overthrow with a series of events that began this week and culminate on February 11. Moussavi and Mehdi Karrubi, another Iranian opposition leader, have urged supporters to demonstrate.
Although Rahbar mentioned "leaders," it was not immediately clear from INN's article whether other opposition leaders were mentioned in the letters. Details of the letters were not outlined on INN, and it was not immediately clear what charges the parliamentary members believe Moussavi should face.
However, Rahbar -- the Friday prayer leader in the city of Isfahan -- referred to his Friday sermon, saying, "I emphasized yesterday that the people want the leaders of the conspiracy convicted because they are disturbing the peace and have committed aggression against the life and property of the people," INN reported.
Mohsen Eji, the prosecutor general, said his officer has received the letters of complaint, and that they have been sent to the prosecutor in Tehran, Iranian media reported..
Rahbar said that even more members of parliament would like to see the opposition leader prosecuted.
"All the members of Parliament, except for a small group, demand that legal action be taken against Moussavi," he said, according to INN.
Iran has been trying and executing people accused of demonstrating against the June 12 presidential election victory of incumbent Mahmoud Ahmadinejad. In the final results, Ahmadinejad was declared the winner over Moussavi, a result seen by many Iranians as questionable or rigged.