Barcelona attack: CIA warned Spanish authorities of possible Las Ramblas terror two months ago, reports suggest

The CIA warned Catalan police two months ago that Las Ramblas in Barcelona could be a target for a terrorist attack, reports suggest.After attacks in Paris, London, Berlin and Brussels, US counter-terrorism officials reportedly believed Islamist terrorists could be planning a massacre in the Spanish city.At least 13 people were killed and more than 100 injured when a van ploughed into crowds of people on Las Ramblas on Thursday.