Police are looking for a number of people who were involved in, or who may have witnessed, an assault last weekend in Philadelphia's Old City section.

The entire incident was caught on surveillance camera.

The video shows the EZ Park parking lot at 100 Chestnut Street. It begins showing a group of people who come running into view, stopping in front of the camera.

Within moments, a number of men can be seen assaulting another man.

At one point the victim backs away. That's when one of the suspects, who was wearing a black shirt and light pants, walks up and punches the victim, knocking him out cold.

Police say the victim suffered numerous facial fractures including a broken jaw and a fractured left orbital bone.

The victim, a 27-year-old man, had just left the Mad River Bar at 126 Chestnut Street when he was assaulted, according to police.

Investigators released the following descriptions of some of the suspects:

* #1 White male, mid 20's, dark hair, black "T" shirt, light pants
* #2 White male, olive skin, 20's, dark hair, light colored shirt and pants
* #3 White male, olive skin, 20's, black "T" shirt with white sleeves and red hat

Anyone with information is asked to call police at 215 686 TIPS (8477) or visit http://www.phillypolice.com/forms to submit an anonymous tip online.