Because the game was interrupted in the 70 Minute from the referee because one of the linesman was hit on the head by an object from the Bochum fans block.
And the Live ticker when was reading them says still match is interrupted , anyway i guess the game will going to Gladbach after this ,
and maybe Bochum will get some punishment after this was happened to the linesman
-snip-
Why do they have to be childish like this when stupid actions like this will only make them and their favorite team lose.
Even though the linesman wasn't seriously injured, it's very clear that this tarnished the league in my opinion.
Bochum has already released an apology in their tweet and condemned the behavior of the supporters who carried out such anarchic acts