TEHRAN, Young Journalists Club (YJC) - Ortega has opened a tentative dialogue process with the opposition in recent weeks in an effort to bring an end to a broad movement against his iron-fisted rule that began last year.
But the issue of political prisoners remains a strain on the talks.
Police said that they had arrested 107 people at the would-be demonstration. They were later released.
An AFP journalist at the scene said the police deployed tear gas and bullets against protesters, and seized the equipment of journalists covering the scene.
Earlier, opposition members reported that at least 30 people were arrested for trying to take part in Saturday's demonstration, which ultimately did not take place.
Source: AFP