“There were dozens and dozens of cars, most of which had their license plates covered,” Turco said via email. “It went on for minutes.”

As you can see in the video, men are corking traffic in SUVs equipped with police lights and sirens. One of the men blasts a Rumbler-type siren when Turco tries to get video of his license plate, which was taped over.

We called the NYPD public information office to ask if the department authorized the caravan, and if people who aren’t police are allowed to disrupt traffic and have vehicles with lights and sirens. We were directed to send an email, which is NYPD’s way of saying “Go away.”

Correction: A representative of Crown Heights Shomrim, Mendy Hershkop, contacted us to say that contrary to Streetsblog’s speculation in the initial version of this post, his group was not involved in this event and never engages in traffic control. “I don’t do it for this reason,” he said. “Blocking off streets isn’t what we’re trained for.” He attributed the actions in this video to Crown Heights Shmira, a separate group.