Hundreds of students marched in Athens on Friday to mark the 11th anniversary of the killing of 15 year-old Alexis Grigoropoulos by police in 2008.
Footage shows chanting protesters marching towards Syntagma Square while passing in front of Athens University.
Grigoropoulos was 15 years old when he was killed in 2008 by two police officers who were involved in an argument with a group of teenagers in central Athens' Exarcheia district.
The officers were found guilty of murder and of acting as an accomplice respectively.
Grigoropoulos's death resulted in large protests throughout Greece, and solidarity demonstrations around the world. His death is marked every year in several cities across the country, often resulting in violent clashes.