Violence mars Brazil demonstration

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.