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Mass protests turn violent in Chile for a second day
Demonstrators in Chile have clashed with police in the capital, Santiago, on the second day of mass protests to demand free public education.
Hundreds of masked youths threw stones and bottles at the police and attacked a petrol station.
The police responded with tear gas and water cannon to disperse the crowds.
The government has warned it will invoke an emergency security law to help quell the protests - the biggest in Chile since 1990.
The BBC's Gideon Long was at the protest.
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