Macva Sabac supporters snuck into the club's ground early on Sunday morning, in order to dig a grave onto the pitch!
Club bosses were stunned to find the large hole in the grass, which was also adorned with a crucifix.
A message on the cross read: "Second division or this."
Luckily, Macva Sabac won the game, which left them just two points behind the league leaders in second place.
Police have begun an investigation into the matter, but no arrests have been made.