A 13-year-old student from Temasek Junior College died on Wednesday during a physical education (PE) lesson, after he reportedly had an asthma attack.

A relative of the boy, who is an Integrated Programme student, told Chinese evening daily Lianhe Wanbao that the student had informed the PE teacher that he felt unwell. He collapsed right after that.

Police have classified the case as an unnatural death and are investigating.

This is the second such case this week. On Monday, a 16-year-old student from Tanglin Secondary died after jogging during a PE lesson.