Violence mars Brazil demonstration
8 October 2013 Last updated at 09:29 BST
Several people were injured when a protest in the Brazilian city of Rio de Janeiro turned violent.
What began as a peaceful demonstration by teachers and their supporters, calling for better education and services, soon became hijacked by a small group of masked men.
Protests in the country have grown and spread since a simple dispute over bus fare rises in Sao Paulo and Rio de Janeiro prompted a police crackdown.
Wyre Davies reports from Rio de Janeiro.