Thousands mourn Iranians killed in protests

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Play VideoIran protests US statements on its presidential election Play VideoIran warns media not to inflame tensions

Tens of thousands of Iranians have taken to the streets of the capital Tehran for a sixth straight day.

They joined opposition leader Mir Hossein Mousavi in mourning demonstrators killed in clashes over the country's disputed election.

Meanwhile, the country's top legislative body has begun investigating the claims of fraud in the election.

State TV showed pictures of many in the massive crowd wearing green wristbands and carrying flowers as they filed into downtown Imam Khomeini Square on Thursday.

They were responding to Mousavi's call for crowds to gather in mosques or at peaceful rallies to show solidarity with the families of those who died in earlier clashes.

The continuing protests have openly defied Iran's supreme leader, who has urged the people to pursue their allegations of election fraud within the framework of the cleric-led system.

The disputed election has provoked Iran's biggest and most violent demonstrations since the 1979 Islamic revolution.

In this image made available from Mousavi's election campaign media operation Ghalam News shows supporters of Iranian opposition leader Mir Hossein Mousavi, carrying a black banner during a demonstration in Tehran on Thursday June, 18, 2009.(AP Photo/Ghalam News.)

Iranian state media said seven or eight people have been killed in protests since the election results were published on June the 13th. Scores of reformists have been arrested across the country.

Iran's Guardian Council, the country's top legislative body, said on Thursday they have begun examining 646 complaints about voting irregularities.

The council also invited Mousavi and the two other candidates beaten by hardline President Mahmoud Ahmadinejad to discuss their complaints on Saturday.