Update (July 19): The principal of Anglo-Chinese School (Barker Road) has said that one student suffered "minor injuries caused by a pen" in the alleged stabbing incident.
In a statement on the school's website, the principal said that two students had a "misunderstanding".
The injured student was given first aid immediately and then sent to hospital. He was discharged on the same day, the school said.
The police were alerted as an ambulance was called.
SINGAPORE - A secondary one boy was sent to the hospital after getting stabbed during a fight at Anglo-Chinese School (Barker Road), according to citizen journalist website Stomp.
Stomp contributor Fahim alerted the website to the incident that happened on Wednesday (Jul 15).
He said: "There was a stabbing in ACS Barker road today. The police were called in and one boy was taken to hospital by ambulance.
"The condition of the other boy is unknown though we are aware that he was also attacked."
The boy in question shared a photo of his face injury on Instagram, saying that he "can't play ball for a week".
The police have confirmed the incident with Stomp, and said that they received a call requesting for assistance along Barker Road on Wednesday at 1.57pm.
"Upon police arrival, it was established that a case of voluntarily causing hurt has occurred. A 13-year-old youth was conveyed conscious to KKH."
Police added that investigations are ongoing.