A Class 9 student died under mysterious circumstances after he was allegedly found unconscious on his school’s premises in northeast Delhi’s Karawal Nagar, police said.

Tusshar (16) was found unconscious by some students in the bathroom and was taken to a hospital. He was later referred to the GTB Hospital where he was declared brought dead, they said.

Though the school administration claimed that he was suffering loose motions, the boy’s family alleged that he had a fight with some students and was thrashed, police said.

However, the police said that no injury marks were found on the boy’s body.

On the basis of a complaint by the boy’s family, a case has been registered. The medical board will conduct the post mortem on Friday, they said.

Police are questioning his classmates and the students who had found him in an unconscious state in the bathroom.

Tusshar is a resident of Karawal Nagar.