Because of a suspicious vehicle on the stadium forecourt, the 81,365 spectators of the top Bundesliga game between Borussia Dortmund and Bayer Leverkusen (1-0) were not allowed to leave the stadium immediately after the final whistle.In the arena on Saturday evening, from five minutes before the end of the game, it was announced several times that "due to a police operation outside the stadium" all fans must remain in their seats."A suspicious vehicle with a running engine was found in the E3 car park," tweeted the Dortmund police shortly afterwards: "Since it cannot be ruled out that this vehicle could pose a threat, all stadium visitors are asked not to close the stadium after the end of the game leaving."The first "measures to eliminate the dangerous situation" are being taken.The spectators are not allowed to leave the stadium "so that the police measures can be carried out undisturbed."The club announced a little later that the fans could "now leave the stadium in an orderly manner".