The New York Daily News reports that the NYPD is investigating an incident recently caught on video in which a plainclothes police officer can be seen punching a black boy who is being held by three other officers. An onlooker can be heard yelling “He’s twelve! He’s twelve” and identifies herself in the video as a lawyer. The video, which was uploaded to YouTube Wednesday and is embedded above, has the following description:

This happened today on my way to the post office. The kids were 12. They had supposedly pushed one of their classmates down. However when the victim was asked, he said those weren’t the guys. They were still taken away. 12. Years. Old.

The Daily News was unable to verify the age of the boy being punched in the video.