Students in Chile have been protesting for 7 months now for education reform in the country. Mass demonstrations were held last year by students, teachers and families and the marches paralyzed major Chilean cities in 2011.
reports that Thursday's protest in Santiago is the first this year by the student groups which include both high school and university students.
The rally was considered unauthorized by the authorities as, according to the police, the organizers had not applied for permission 48 hours before the event.
The police used both tear gas and water cannons to break up the march.
50 protesters were detained in Thursday's march on Santiago's main avenue, which drew roughly 2,000 participants, according to the Chilean police.
However, organizers say that 5,000 to 7,000 high school students took part along with some university students.
The crisis over education reform in Chile remains unresolved despite seven months of mass demonstrations last year by students, teachers and families.