Video footage has emerged of students in Santiago, Chile, setting fire to a bus in protest at education reforms made by the Chilean government.
Thousands of students set three buses on fire as widespread violence ensued, leaving dozens injured, according to ABC News.
The action is the latest in a bout of violence which has dominated the city for months.
In February, students clashed with police, who used a water cannon and tear gas in an effort to control the crowds.
The Chilean government has previously said it would invoke emergency security laws to help quell the violence.
Students say the education system is profit-driven and provides poor instruction but talks between the government and students - who are backed by teachers and trade unions - have failed to reach a compromise.
The protest movement, which start in spring last year, is the biggest the country has seen since 1990, which marked the return to democracy.
Chilean universities set some of the world's highest tuition fees.