Over the past several years an increasing number of terrorist attacks committed in the name of Islam and targeting civilians have taken place in many Western democracies, calling for more research on the impact of these exogenous events on citizens’ attitudes towards immigrants. Using a quasi-experimental design, this study examines the short-term effect of the Paris attacks of the night of 13 November 2015 on the attitudes towards European Union (EU) and non-EU immigrants across 28 EU countries.