Pupils in Dorset have been suspended amid claims they posted videos showing an autistic pupil being bullied at school on the internet.
The videos are said to show the victim being taunted
Five pupils from Bournemouth and Poole College, Poole, were suspended by the school after it received complaints.
The National Autistic Society was alerted by an internet user who spotted the videos with a message which said the victim was autistic.
A college spokesperson said the incident was being investigated.
The videos are said to show the victim being taunted verbally and physically.
Benet Middleton, of the National Autistic Society, told BBC News: "Bullying is always bad but I think we can all agree that when the bullying is based on someone's disability it is particularly disgusting behaviour.
"It's reflective of a very worrying trend we're seeing.
"Research we've done recently shows children with autism are very, very, highly likely to be bullied - rising to as many as six out of ten with Asperger's, a high functioning form of autism."
The college said it had a strict stance on bullying and would be interviewing the children involved.