Tens of thousands of students and teachers have marched in the Chilean capital, Santiago, in the latest mass protest to demand educational reform.
The march was largely peaceful, but ended with clashes between riot police and masked youths throwing stones.
The protest movement - now in its fourth month - is the biggest in Chile since the return to democracy in 1990.
The government has promised some reforms, but the students say they do not go far enough.
Protest organisers said around 180,000 people took part in Thursday's march, making it the biggest in several weeks.
Some wore fancy dress or played musical instruments as they marched through Santiago.
As the march drew to a close, small groups wearing hoods threw stones at riot police, who responded with tear gas and water canon. more