Transcript for Adult Brawl Erupts at Chuck E. Cheese Birthday Party

It is -- children's body breaks out into a birthday brawl -- -- Chucky cheese and it wasn't -- kids fighting but the adults one woman even caught on camera holding a baby. And throwing punches at the same time the fight broke out and come back and Suffolk County his Eyewitness News reporter Lucy Yang. It was. Ugly and hostility. And violence. Ended all took place at a kiddie birthday party at this Chucky cheese and collect behind. About a parents can be very stupid. And ridiculous what should've been an innocent birthday party at this popular children's arcade. Turn nasty on Saturday we're told the fight erupted around the time they started singing happy birthday. All caught on cell -- You can see this little girl trying desperately to do the right thing -- hold back the adult. In this scene it's -- -- mothers are fuming cradling a baby with one arm. While fighting with their free hands -- Shouldn't have been -- -- control you don't -- to. Deal with -- issues later the manager is not allowed to comment on the fault in this video you see him -- to home centers and -- the story we. This what is he -- -- is supposed to be cool side. Supposed to be -- and that this device that what should it and it would presidents and wishes and happy memories. Is now being investigated by the Suffolk county police. Intel -- Lucy Yang channel seven Eyewitness News.

This transcript has been automatically generated and may not be 100% accurate.