The second hearing in the trial of protesters, including top reformists, who opposed President Mahmoud Ahmadinejad's re-election resumed in Tehran on Saturday, local news agencies reported.
The session was to be held on Thursday but was pushed back to Saturday as some of the lawyers of the defendants had asked for more time to study the charges against their clients.
Those in the dock in a revolutionary court included some reformist politicians and journalists, the ISNA news agency said.
The first session was held on August 1 where about 100 people who disputed President Mahmoud Ahmadinejad's re-election went on tiral on various charges, including rioting after the June 12 vote.
It was unclear how many of the about 100 defendants were in the dock on Saturday.
During the first session, several top reformists and aides of opposition leaders backed down from earlier allegations, saying that Ahmadinejad's victory was clean and there had been no fraud in the election.
Another 10 protesters were put in the dock in a separate trial on Sunday.
Iran's main opposition leader Mir Hossein Mousavi and former reformist president Mohammad Khatami have denounced the trials.
Ahmadinejad was formally sworn-in on Wednesday for second four year term.