An ISIS militant threatening further violence in Spain has himself been attacked by a flurry of memes mocking the jihadist's apocalyptic message.
The authorities were "starting from zero" in the search for the van driver, allowing him significant lead time to escape their grasp.
Abdelbaki Es Satty died in a faulty explosion at the cell's safe house a day before attack, police say.
Catalan officials believe the suspect on the run is the driver of the van in the Las Ramblas attack.
Raül Romeva tells Newsweek the province does not have an unusual problem with radicalization.
The West is increasingly at risk for attacks from ISIS and those inspired by it as countries cope with returning militants and alienated locals.
He said they should not make the same mistake as Venezuelan or Algerian Jewish communities.
The man first went to local police to claim his identification documents had been stolen after his image was spread by news media.