The Catalan minister for public works, Joaquim Nadal said that “now is not the time to place blame” in the tragedy in Castelldefels, but then goes on to say that it was really negligence on the part those non-rule abiding Ecuadorian, who fail to understand that this is a country of rules that must be followed. Not that he’s blaming anyone.
An excellent infographic from El Mundo shows how the tragedy unfolded.
Like any tragedy of this magnitude, many things all went wrong at exactly the wrong time. The timings of the trains, the confusion around the closed overpass, the crowding of the underpass, the fact that it was in the middle of the night, the fact that a team of security guards was scheduled to arrive seven minutes after the incident, an impatient crowd of teenagers, etc.