"The boy it happened to is just the sweetest little thing ever".
The school did not tell parents about the hateful incident until today - when the Bath Chronicle made a decision to publish their story.
Three of the white pupils were initially expelled by the headteacher of the secondary school in Somerset, which can not be named to protect the victim's identity.
Police are investigating the incident, which took place on the school grounds in January.
One parent of a mixed race pupil at the school said the incident was filmed on Snapchat and circulated among pupils.
Police confirmed they are investigating the alleged incident, said to have taken place on school grounds during a lunch break. "It just makes it even worse", the parent told the paper. Adding, "They believe nothing will happen to white children if they behave badly but something happens to them".
"I know it was a game they all played, the white boys as well, but the mock auction saw this boy being really humiliated and he was apparently panicking".
The name of the school and the student who was assaulted have not be released to protect the child's identity.
"As a parent, my moral compass at the moment is screaming", the mother said. Someone has to be held accountable for it. Someone has to say sorry'.
They decided the expelled trio should only be excluded from school along with the other four boys for two weeks.
"A full investigation was instigated in line with both internal school procedures and Department of Education requirements, including contact with the police".
'Given the on-going police investigation and the need to protect all those involved, you will understand that it has been necessary to maintain confidentiality and consequently that the school does not wish to comment further'.
'You can be assured that the school has taken this incident exceptionally seriously and that our absolute priority was, and remains, that the right path is taken for all those involved as well as the wider school community.
"Enquiries are ongoing and the school is assisting".