Source (greek only): http://www.kathimerini.gr/4dcgi/_w_articles_kathremote_1_15/10/2007_207901
A double arson attack was realised around 3:10 in the morning, when a subsidiary of Ethniki Bank on Leontos Sofou Str. in the city center and the local offices of Nea Dimokratia (the greek ruling party) were made targets of gas-canister bombings.
A communique sent in firstname.lastname@example.org claiming the action for Anti-state Militia (Antikratiki Politofilaki) as an action of solidarity to anarchist prisoners Giorgos Voutsis-Vogiatzis, Giannis Dimitrakis, Chrissostomos Kontorevithakis, Marios Tsourapas, Christina Tonidou, Giorgos Tsolkas and Giannis Lazaridis*, can be found (in greek only) here: http://directactiongr.blogspot.com/2007/10/15102007.html
*The prisoner's name is actually Sotiris Lazaridis.