He was there to calm things down, but an incident with the dog set things off.

After the Vitesse - De Graafschap match in Arnhem, the Netherlands, things got out of hand! Fans became troublemakers and attacked the police. The police had to get out their truncheons to calm things down. Needless to say, the atmosphere quickly became tense. That's when the police dog stepped in, but the situation got completely out of hand. Watch what happens to the animal!