The spokesman of Tehran police department Colonel Mahdi Ahmadi said Saturday that "several" people were detained for throwing rocks at police and setting motorcycles on fire, according to IRNA.
No exact number was given for the detentions.
On Friday thousands of anti-government protesters staged counter-demonstrations to the official pro-Palestinian rallies of Jerusalem day.
It was the first major opposition protests in two months.
The opposition says President Mahmoud Ahmadinejad's June re-election was fraudulent.
