Algerian police fired tear gas in an attempt to disperse crowds on Friday after protesters calling for the resignation of President Abdel Aziz Bouteflika hurled stones at them.
Thousands are gathering for the sixth successive Friday of mass anti-government protests.
Earlier this week an army general, Luitenant General Ahmed Gaed Salah, called for the position of president to made vacant.
But opposition parties in Algeria said it would not guarantee free elections.
On Friday, riot police used tear gas and water cannon to disperse crowds in the centre of the capital Algiers.
The renewed calls for regime change come just days after Luitenant General Ahmed Gaed Salah demanded that Mr Bouteflika be declared unfit to rule.
Demonstrations against Bouteflika began last month after the president, who has seldom been seen in public since suffering a stroke in 2013, announced that he would stand for another term.
