The conservative PP government was accused of falsely blaming ETA for the attacks. The day of the attacks, police officials informed the Government that explosives usually used by ETA were found at the blast sites. This, along with other suspicious circumstances, led the PP to suspect ETA involvement. Although there was no direct or indirect evidence from the investigation of the bombing pointing to ETA involvement, the group had been caught with a large amount of explosives some months previously, which looked like preparations for a big strike. According to a report of the European Strategic Intelligence and Security Center (ESISC), the same morning of the bombings the Spanish Intelligence Services and Policy had concluded that the author of the massacre was an Islamist terrorist group, but they had been ordered by the government to deny this Islamist attribution and insist that the ETA were the only suspects, although this same source also states that there is no precedent of collaboration of international Islamists with non-Muslims, and there were two non-Muslims (and police informers) involved in the Madrid attacks.