Source (greek only): http://www.imerisia.gr/article.asp?catid=4667&subid=2&pubid=345221
13 gas canisters (only two of them exploded) were placed near a police station in Patissia district, Athens. Near them were found some leaflets demandind "Freedom to Zoniana".
Note: Zoniana is a village in Crete where, after a policeman got injured after unknown persons opened fire against him, the police took over the whole village with more than 200 men from the special police forces, undercover policemen and riot police units on an inquiry of any violations of arms and drugs laws. The Zoniana residents state they got mistreated and many of them beaten by the policemen that have seiged the village.