Stolen Dynamite

From Startfor's news wire (subscription required):

Spanish officials said material used in the explosives in Madrid was dynamite. They also said the dynamite was of the same type previously associated with Basque separatist group ETA and is believed to be linked to a 2003 dynamite theft in France that Spanish authorities suspected was carried out by ETA.

We won't know for a while who was behind it. But the JUS story does seem a bit fishy.