KENSINGTON (WPVI) -- A 17-year-old boy had just left a friend's house when three unknown men approached him on a narrow street. A surveillance camera captured the horrific moments that followed.It happened around 12:45 a.m. on November 15, 2014, on the 900 block of North 4th Street in Philadelphia's Kensington section.Police say the teenager was outside, waiting for someone to pick him up, when the three suspects approached.Video shows one of the suspects, seemingly out of nowhere, deliver a violent blow to the victim's head. The teen was then punched repeatedly, before being thrown to the ground.Seconds after hitting the street, one of the suspects lifts his leg and kicks the boy in the face.The victim sustained a broken jaw and teeth during the attack.