Islamic State organization published threatening posters on social media ahead of this week's Champions League matches. In Spain they have already raised the alert level.
Two matches will be played tonight as part of the quarter-final stage: Arsenal will host Bayern Munich at the Emirates Stadium and Real Madrid will wait for Manchester City at the Bernabeu. Tomorrow Paris Saint-Germain and Barcelona will meet at the Parc de France and Atlético Madrid will host Borussia Dortmund at the Wanda Metropolitano.