In December 2003, the German newspaper "Der Spiegel" reported that the group could count on as many as 600 supporters in Germany. In another report regarding the possible German contingent, a Turkish rail worker claimed, "Istanbul was nothing. The major butchery is yet to come." Although IBDA-C is thought to have supporters throughout Western Europe, the group has not performed any significant terrorist attacks there since their alleged actions in Istanbul. The number of extremist supporters actively participating in IBDA-C's terrorist plots is not known, but thought to be small.