Duangphet Phromthep, the captain of the Thai boys soccer team known for the high-profile Tham Luang Nang Non cave rescue in 2018, has died in the U.K., British and Thai officials announced. He was 17 years old.

Phromthep, who was most recently one of the subject of Ron Howard’s “Thirteen Lives” in 2022, was enrolled in a soccer academy in Leicestershire, England. He died after being sent to the hospital on Sunday, Leicestershire Police told CNN in a statement. The circumstances surrounding his death remain unclear, but the northern regional branch of the Thai government’s public relations team said on Facebook that the boy died due to an accident.

“The atmosphere at his house in Chiang Rai province was full of sorrow,” PR Thailand’s statement said.

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