Police in Iran have warned that they will confront any opposition protests on the anniversary of the country's disputed June presidential election.
Iran's ILNA news agency quoted Tehran police chief General Hossein Sajedinia as saying that police will confront any illegal gathering.
Opposition leaders Mir Hossein Mousavi and Mehdi Karoubi have called on supporters to take part in peaceful protests to mark the June 12 election, which returned President Mahmoud Ahmadinejad to power.
Iran's opposition accuses Mr. Ahmadinejad of rigging the election, adding that Mr. Mousavi was the rightful winner.
Thousands of people were arrested in the post-election protests that left several demonstrators dead.
More than 80 people were sentenced to prison terms of up to 15 years in connection with the demonstrations. Several other activists face death sentences.
Some information for this report was provided by AP, AFP and Reuters.