Misstänkt föremål funnet i SPD:s kontor i Berlin

The Conspiracy of Fire Nuclei (Greek: Συνωμοσία των Πυρήνων της Φωτιάς, Synomosía Pyrínon Tis Fotiás –SPF), also translated as Conspiracy of Fire Cells or Conspiracy of Cells of Fire, is a radical anarchist organization based in Greece. The SPF first surfaced on January 21, 2008, with a wave of 11 firebombings against luxury car dealerships and banks in Athens and Thessaloniki. Monthly waves of arson have been followed by proclamations expressing solidarity with arrested anarchists in Greece and elsewhere. In September 2009, following an escalation to the use of crude time bombs, four suspected members of the group were arrested. In November 2010 two more suspects were arrested while attempting to mail parcel bombs to embassies and EU leaders and organizations. The organization was designated as a terrorist group on October 13, 2011, by the U.S. Department of State.