This is true, but also consider (from AP news):Quote from mmillar:
ETA tried to bomb Madrid train stations twice in the past few months, but were foiled in both instances. It seems a reasonable assumption that it was them again.
ETA always phones in warnings before it attacks. The interior minister said there was no warning before Thursday's attack.
"The modus operandi, the high number of victims and the way it was carried out make me think, and I have a hypothesis in mind, that yes it may have been an operative cell from the Arab resistance," Otegi said. Otegi noted that Spain's government backed the Iraq war.
