> According to local officials, the Rodalies train collided with a retaining wall which fell onto the track between Gelida and Sant Sadurní on Tuesday evening.

> [...]

> The incident occurred as heavy storms battered north-eastern Spain.

I wouldn't spread conspiracy theories without more information. It has rained really a lot and maintenance of railways are long overdue in Spain and especially Catalonia

sabotage

Slovakia had 2 train crashes in 1 month (October 13 and November 9)

Poland had blown up rails on November 17

You call it a conspiracy, I call it a hybrid warfare

Now this is a strange coincidence, if coincidence at all.