PATERSON, New Jersey (WABC) -- Police in New Jersey are investigating an apparent attack after a video of it was posted on social media.
The video appeared on Facebook this week.
It shows someone throwing a punch and apparently knocking out an unsuspecting victim.
The person shooting the video can be heard encouraging the attacker.
Paterson Police called the video "disturbing" and thanked residents who reported it.
Police Director Jerry Speziale released a video statement Friday on Facebook to the public about the video.
So far, there's no word on any arrests or the victim's condition.