Transcript for Violent Brawl Breaks Out Outside 49ers-Vikings NFL Game
And police near San Francisco are trying to track down suspects after a violent brawl outside Monday night's football game between the vikings and 49ers and Ryan smith tells us. Reporter: This morning, police are looking closely at this video, a swarm of fans and 49er Jerseys caught on camera repeatedly punching and kicking a vikings fan, the attack showing the vikings fan on his hands and knees trying to break free. A security official desperately tries to intervene. But fists still fly. And as the vikings fan lay face down, a woman kicking him twice. The man posting the video claiming the vikings fan instigated the attack talking smack to a 49er fan then saying in a crowd, what's up, any of you bleepers want some. Police dispatched to the scene and the assailants leaving before they arrived. We put investigators on to fast-track the case and identify these folks. Reporter: This scene all too common in sports stadiums. Last October, this fight in a 49ers bathroom left a victim parnthly paralyzed and who can forget Bryan stow, the man attacked by two men on baseball's opening day 2011 putting him into a coma for nine months. In this attack the 49ers saying they're working with police to find those responsible. For "Good morning America," Ryan smith, ABC news, New York.
This transcript has been automatically generated and may not be 100% accurate.