Violence was triggered during the otherwise peaceful protests in central Athens, by anti-establishment and extreme-right groups that clashed between themselves and with riot police stationed outside Parliament.
Moving in roads surrounding Syntagma Square and chiefly long Amalias Avenue in front of Parliament, where the majority of the 'Indignant Citizens Movement' protestors were gathered, they attacked police and each other with clubs, stones and petrol bombs, prompting police to respond with use of tear gas.

Several people among the peaceful protestors interevened in an attempt to stop them and keep the trouble-makers away from the peaceful protests, while some people suffered minor injuries during the clashes.

Among them the TV documentary journalist Tasos Telloglou, who was attacked by a group of unidentified individuals on the corner of Perikleous and Lekka streets. He was has been taken to hospital for tests.