Djurdjic started for Degerfors last weekend and was also part of the squad that the club presented on Saturday.
But when Sunday came, the 36-year-old had been poked.
The reason for the investigation is that Djurdjic, in a picture on Twitter, was seen at a nightclub in Stockholm during the night until Sunday.
- I do not have Twitter myself but have secondary information in the picture, says chairman Fredrik Rakar to VF and continues:
- We have made a unanimous and balanced decision that then you are simply not in the squad.
No further action against the player shall be relevant.
Sirius led the match at half time with 1-0, after Danish Marcus Mathisen with a well-placed shot from the left edge arranged his first Allsvenskan goal of the season.
The match is in progress.