Since the bombings, the chief opposition party, PP (which lost power in the election in the immediate aftermath of the bombings), together with conservative media in Spain, have overtly argued the possibility that the Socialist party, the police, the Spanish, French, and Moroccan secret services, and, of course, ETA, had a role in organisation of the outrage. Not all conservative media outlets were involved in this campaign.
After the bombings, the PP (which lost power post-election) and certain conservative Spanish media have suggested involvement of the Socialist party, police, intelligence services from Spain, France, Morocco, and ETA in planning the outrage. Not all conservative media were involved.