The police investigate after a viral video seems to have a Syrian refugee seriously assaulted by another pupil.
Officials handle the incident at Huddersfield, West Yorkshire, as a racial aggressive assault.
The victim is seen walking across a field when a pupil appears to pull on the ground and turn water in his face as crowd of schoolchildren look at it.
The disturbance pictures show that the victim eventually rises and walks away, as the attacker is heard orally continues to be abused.
Sky News has taken the decision not to show the video.
West Yorkshire Police informed about the event one month ago, but the video has come to an obvious and has been split thousands of times.
"The police investigated following a report on an aggravated assault of a 15-year-old man. The incident was reported to the police on October 25 at about 1pm," West Yorkshire Police said.
"The male victim was walking across some fields, when a male 16-year-old man came to his hang and pushed to the floor."
Police reported that the incident was treated as aggressive assault and inquiries are ongoing.
Pupils attend Almondbury Community School in Huddersfield.
Chief Trevor Bowen said: "The safety and welfare of students is crucial to us and this was a very serious event.
"We are not able to comment further as we support the police with their investigation but I want to be clear that we do not tolerate unacceptable behavior of any kind in our school."
:: Anyone who has seen the event or any further information is asked to contact the police by 101 quoting a crime reference number 13180537716 or information can be passed to Crimestoppers anonymously on 0800 555 111.