Greek police have clashed with demonstrators in Athens two years to the day after the police killing of a teenager triggered the country’s worst riots in decades.
Several hundred youths threw petrol bombs and stones at riot officers, who responded with tear gas.
At least three people – one protester and two bystanders – were injured and taken to hospital.
Earlier about 3,000 students marched through the Greek capital chanting anti-government slogans.
Animosity has been amplified by continuing public discontent over the government’s austerity measures to tackle the Greek debt crisis.
The death of 15-year-old Alexis Grigoropoulos in 2008 prompted widespread violence that paralysed Athens for weeks.
At the spot where he died, many gathered to remember him.
Two policemen were convicted of his murder earlier this year.