A 16-year-old boy collapsed and died after a physical education lesson in his school on Monday morning.

The Tanglin Secondary student had been jogging during the lesson, before he collapsed and was sent from his school in Clementi to the National University Hospital, according to a Shin Min Daily report on Tuesday. The boy's father told the evening paper that he had sent his son to school that morning and he had looked "normal".

Police confirmed the incident, and said they received a call on Monday morning at 8.27am requesting assistance at 301 West Coast Road. A spokesman said that on their arrival, a male subject was conveyed unconscious to NUH, where he was subsequently pronounced dead on the same day. Police are investigating the unnatural death.

The Straits Times understands that the boy was pronounced dead at around 10am in the hospital.