Bullied girl, 14, disappears the same day video of her being brutally attacked at school is posted online.

A bullied teenager is missing after a video surfaced online of her being struck repeatedly by a classmate. 

Baileigh Karam, 14, of Carlsbad, California, disappeared last Friday when the cell phone video was posted on Facebook.

In the video, a female student strikes her as a crowd of fellow students watch and cheer. Karam is heard begging her attacker to stop.