A window of Dortmund's team bus is damaged after an explosion before the Champions League quarterfinal soccer match between Borussia Dortmund and AS Monaco in Dortmund, western Germany, Tuesday, April 11, 2017. . Dortmund's Marcel Schmelzer talks to police officers outside the team bus after it was damaged in an explosion before the Champions League quarterfinal soccer match between Borussia Dortmund and AS Monaco in Dortmund, wester... .