Riot policemen prevent university students from marching during a demonstration in which they demand political change in Algiers on Monday, May 2.

Youths throw stones at anti-riot police squads from a roof during demonstration on March 16, 2011 in a district of Algiers. The demonstrators demanded a date for their move from a dilapidated estate built in the early 1960's which is inhabited by some 1500 families.

Algerian students scuffle with riot police officers near the Ministry of Higher Education in Algiers on Feb. 21. The students want the government to scrap a new law that dilutes the value of their diplomas by giving equal status to less-qualified degree holders in the job market. Monday's protest follows scattered strikes and protests in recent weeks in defiance of a ban on public gatherings in Algiers dating to a bloody Islamic insurgency in the 1990s.

Protesters clash with riot police officers during a demonstration in Algiers, Saturday, Feb. 19. Algerian police thwarted a rally by thousands of pro-democracy supporters Saturday, breaking up the crowd into isolated groups to keep them from marching.

A sheep is seen at a market on the outskirts of Algiers, ahead of the Eid-al-Adha festival, November,15 2010. Muslims across the world are preparing to celebrate the annual festival of Eid al-Adha or the Festival of Sacrifice, which marks the end of the haj pilgrimage to Mecca by hundreds of millions of Muslims, with the slaughter of goats, sheep and cattle in commemoration of the Prophet Abraham's readiness to sacrifice his son to show obedience to Allah.