Poll loser Mousavi at Iran rally

Defeated Iranian presidential candidate Mir Hossein Mousavi joined a huge rally against the result of last week's election, defying a government ban.

Mr Mousavi, who was making his first public appearance since Friday's vote, believes results were rigged in favour of President Mahmoud Ahmadinejad.

The demonstrators gathered in Tehran's Revolution Square, chanting pro-Mousavi slogans as riot police stood by.