By Diana Rocco

PHILADELPHIA (CBS) — The eyewitness video is chilling.

A 24-year-old man is attacked from behind and left unconscious lying in an intersection after he confronts a group of kids on bikes.

“By the time I got to him, yeah it was about maybe 30 seconds later, so he had regained consciousness, but was very disoriented. It was pretty clear he had a concussion and a pretty large injury on his face,” an eyewitness said.

“I didn’t think that it would get to the point with all the cars around that there would actually be an altercation in the street,” another eyewitness said.

A couple who asked not to be identified watching from their apartment window was able to rush to the man’s aid while calling police and shooting this cell phone video.

It happened Thursday around 9 p.m. at 19th and Fairmount. Police say a group of 10 to 15 minors on bikes were riding through the streets hitting cars with sticks when the victim asked them to stop.

“It was really escalating, people were getting really upset so we became pretty concerned someone was going to get hurt,” an eyewitness said.

Seconds later this happens  — as the group circles on their bikes, one throws a water bottle at the victim and another suspect punches him from behind, leaving the man lying unconscious and bleeding in the intersection.

“He went down pretty quickly and he didn’t move after that and I was really concerned. I stayed with him for about 15 just holding pressure on his face,” an eyewitness said.

Police say the same group surrounded a couple on Lombard Street a half an hour earlier while they were stopped at an intersection and tried to pull the woman passenger from the car. A short time later, police arrested a 16-year-old and two 12-year-olds from the Oxford neighborhood but believe more are involved.

“There’s an aggressive nature to it that seems planned and that’s especially disturbing,” an eyewitness said.

The victim was taken to Hahnemann University Hospital with a fractured jaw.

The three juveniles were charged with aggravated assault and criminal conspiracy.  Police say more arrests may follow as they review the surveillance video.

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