security and battling between greek police and anarchist supporters took place in the centre of athens , greece , during the against - state demonstration of the 4th european social forum who is being occasion in the greek community , from 4 to 7 of may 2006 . the march of the approximately 1 , 000 anarchist ended with clash between groups of anarchists and police . riot police used poison gas , while a part of a greek school , a hyper - food store and around 50 cafe window in west atlanta were damaged .
The riots in Greece started on December 6.