The trial has begun in Iran of a number of senior opposition figures following June’s disputed presidential election.
The defendants, who include former ministers in the 1997-2005 Khatami government, are accused of conspiring with foreign powers to organise unrest.
Two leading economists are also on trial, Saeed Leylaz and Kian Tajbaksh.
It is the fourth such trial since the disputed re-election of President Mahmoud Ahmadinejad, a conservative, sparked pro-reform street protests.
