Largest student protest this year in Chile turns violent
17 May 2012 Last updated at 13:33 BST
Tens of thousands of Chilean students have taken to the streets of Santiago to demand free education in the country's biggest protest so far this year.
Chile is the only country in Latin America that charges for university education and students say their fees are among the highest in the world.
The protest started peacefully but turned violent when marching students clashed with police.
BBC Mundo's Vladimir Hernandez reports.