Three people detained after June's disputed presidential election have been sentenced to death, Iran's Isna news agency reports, BBC reported.
The judgements are preliminary and must be confirmed by a higher court, Isna says. Full names have not been given.
The only named opposition activist sentenced to death over the post-election protests is Mohammad Reza Ali Zamani, 37, a monarchist.
The unrest was triggered by President Mahmoud Ahmadinejad's re-election.
More than 100 people have faced trial before a Tehran Revolutionary Court for their part in the protests.