© Impression écran de la vidéo
The incident, which was filmed by a bystander, occurred on Saturday evening.
The video shows the man already on the ground and the guard dog biting down on his lower leg.
Despite calls from the security personnel, it took a while for the dog to release the man. It is unclear at this stage whether the animal was provoked in any sense or not.
According to RTL sources, the victim was subsequently brought to a hospital for treatment.
Police further noted that he was allowed to leave soon after, and that the man was placed in detention for behaving aggressively towards the hospital staff.
Authorities have launched an investigation into the matter.