Bulldogs officials believe they know the identity of a fan who hurled a glass bottle towards the vicinity of the Raiders bench, narrowly missing players and smashing on an exercise bike, in an incident which marred Canberra's upset win over Canterbury at Belmore Sports Ground on Monday night.

The bottle-throwing drama spoiled a Bulldogs game for the second straight season with two objects hurled towards the Raiders bench from Belmore's western grandstand or general concourse. One of the objects is believed to have been thrown in the immediate aftermath of Canterbury back-rower Josh Jackson being sent to the sin bin.

The glass bottle was believed to be Wild Turkey bourbon.