Police on High Alert as Islamic State Threatens to Attack Champions League Football Matches | 9 April 2024 | Police across Europe are on high alert after Islamic State-linked media published calls to attack high-profile football quarter-final matches taking place this week and expected to be attended by tens of thousands of fans. Messages including "destroy their meetings" and "kill them all" have been broadcast with images of European football stadiums due to host Champions League quarter-final matches this week. Four matches this week, at the Santiago Bernabéu Stadium in Madrid, the Cívitas Metropolitano in Madrid, the Emirates Stadium in London, and the Parc des Princes Paris, are to be played on Tuesday and Wednesday evenings this week.