Two teenagers have been stabbed in a school Dulwich, South London.
The pair, both 15-years-old boys, were taken to hospital after suffering knife-wounds from the incident, which took place at around 3:30pm at Kingsdale School.
One remains in a critical condition, the other is stable.
A teenager was arrested in connection with the event, police confirmed, and has been taken to a south London police station for questioning.
In a statement, the Metropolitan Police Service said: "Police were called at 15:30hrs on Thursday, 19 November to reports of a stabbing at a school site in Alleyn Park, Dulwich.
"Police and the London Ambulance Service attended and discovered two 15-year-old boys suffering knife wounds.
"Both have since been taken to a south London hospital for treatment.
"One teenager remains in a critical condition. The other boy is in a stable condition.
"A teenager has been arrested in connection with the incident.
"He has been taken to a south London police station. The investigation is ongoing."