The Ministry of Health (MOH) has dismissed speculation that the death of a 14-year-old Indian-origin student at a premier Singapore Sports School earlier this week is linked to COVID-19 vaccination.

It is "untrue and irresponsible", reported TODAY newspaper, citing the ministry statement on Saturday.

Secondary 2 student-athlete Pranav Madhaik died on Wednesday after he felt unwell during a 400m fitness time trial on October 5.

On Saturday afternoon, the school revealed that the cause of death was cardiac arrest with antecedent cause of congenital malformation of coronary vessels.

"Based on the Ministry of Health's vaccination records, the student had received his last dose of Pfizer-BioNTech's COVID-19 vaccine more than 18 months ago," said the ministry. "For an unvaccinated person, the risk of COVID-19 infection leading to severe illness, far outweighs that of vaccination." In a press statement issued on Saturday, the Singapore Sports School said Pranav told the badminton coach that he was feeling unwell after completing a 400m fitness time trial at about 6.26 pm on October 5.

The coach told him to rest and the boy did so at the side of the starting point of the track while the coach attended to the time-trial data on his phone.

The coach then left the track to brief other students on competition matters, not realising that Pranav was still resting at the same place. He then left the school premises after the briefing.

The teenager interacted with two other groups of students before a track and field coach noticed him. After he was given water, the coach assessed that Pranav had difficulty getting up, even with help.

An ambulance was called and his parents were informed. The badminton coach returned to accompany Pranav to the hospital.

The coach has been served a notice of dismissal.

"It was found that the Badminton coach should have checked on Pranav to ensure his well-being before leaving the track.

"He did not account for all his student-athletes before dismissing them from training, which was not in accordance with the school's safety protocols," TODAY quoted the school as saying.

Except for the headline, this story has not been edited by The Telegraph Online staff and has been published from a syndicated feed.