A coroner has ruled that a 17-year-old boy at Brooke House College in Market Harborough, Leicestershire, committed suicide, The Guardian has reported.

Duangphet Phromthep, known as Dom, was one of the members of the Thai football team who became trapped in a cave for several days in 2018 attracting worldwide attention and being rescued by divers who anesthetised them and steered them to safety.

The boy died at Kettering general hospital on 14 February, two days after being found unconscious at the co-educational independent boarding and day school.

Professor Catherine Mason, senior coroner for Leicester city and south Leicestershire, recorded a conclusion of suicide.

Mason said Duangphet “was not known to mental health services, and it is not known why he took the actions that he did… It could not have been foreseen or prevented. The police investigation has found no evidence of third-party involvement or suspicious circumstances.”

Brooke House College’s principal Ian Smith said the school “remains united in grief” over Dom’s death and that he would be “hugely missed”, adding: “As a college, the health, wellbeing and welfare of our students is our absolute priority. This was reflected in our recent ISI [Independent Schools Inspectorate] safeguarding inspection from April 2023, which confirmed pupils know they have many people they can speak to, that they would be confident to do so if they felt any concerns, and they know those concerns would be acted on if they did raise them.

“The coroner also acknowledged the entire college community for the high quality of our student care, welfare and safeguarding and noted this tragic incident sadly could not have been foreseen nor prevented.

“Dom will always remain a part of the Brooke House family and will be hugely missed.”

Dom was captain of the Wild Boars (Moo Pa in Thai) football team, who became trapped in the Tham Luang cave system in 2018 after a sudden storm flooded and blocked the exit. The boys, then aged between 11 and 16, and their 25-year-old coach were trapped for nine days before they were found by an international search and rescue effort involving about 10,000 people.