The Wild Boars football team rescued from a Thai cave have only just been told about the death of the ex-Navy SEAL killed while taking part in the mission.
The 12 boys and their coach are recovering in hospital after spending 18 days stuck inside the Tham Luang cave.
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Doctors say the boys are all in good health after the three rescue which involved a team of Thai Navy SEALS and international cave diving experts.
But now the boys are mourning the loss of former Navy SEAL diver Saman Kunan, who died on July 6 while installing oxygen tanks along the caving channel, according to reports.
The boys were first told about Mr Kunan's death on Saturday (local time), after doctors deemed them both mentally and physically strong enough to take the news.
"All cried and expressed their condolences by writing messages on a drawing of Lieutenant Commander Saman and observed one minute of silence for him," Permanent secretary at the health ministry, Jedsada Chokdamrongsuk said in a statement.
A photo shows the boys crowded around a portrait of Mr Kunan - which the boys had written commemorative messages on and promised to be "good guys".