Iranian riot police on Saturday clashed with supporters of the main opposition candidate in disputed presidential elections.
Demonstrators wearing the trademark green color of Mir Hossein Mousavi chanted slogans condemning the results that gave a landslide victory to President Mahmoud Ahmadinejad. Protesters set fires to tires outside the Interior Ministry in the most serious unrest in Tehran in a decade.
Police attacked demonstrators, beating them with clubs and smashing cars.
An Associated Press photographer saw a plainclothes security official beating a woman with his truncheon.