Two teenagers have been arrested after a boy suffered serious injuries in an attack at a school in Rotherham.
The two boys, both aged 16, are being questioned on suspicion of causing actual bodily harm following the incident at Brinsworth Academy on Monday 6 September.
The alleged victim is also in his teens.
Police have asked people not to share footage of the incident on social media.
Detective Chief Inspector Daniel Boulter said: "This was a particularly nasty attack that left the victim with serious injuries.
"I'm aware the incident was filmed and has been shared on social media.
I would urge members of the public not to share this footage as it is incredibly distressing for the victim and his family and could harm future legal proceedings."