Snapchat video released showing what appears to be girls filming and laughing as an assault takes place is being investigated by police.
To view video via The Argus website and for more on this story go here:
Please be mindful that the video shows scenes of graphic violence that some people may find upsetting.
Sussex Police have identified the girls involved in the incident and are currently investigating.
The video was posted by girls involved in the assault onto social media last week.
Local anti-bullying campaigner Theresa Youngman started an online petition which gathered 120 signatures asking the near-by school, PCS (Peacehaven Community School) to look into the incident.