The eight rescued boys are healthy are in 'high spirits.' They are under constant medical supervision to eliminate any risk of infection.
"If, as we all hope, they are reunited with their families in the coming days and their health allows them to travel, Federation Internationale de Football Association would be delighted to invite them to attend the 2018 World Cup final in Moscow as our guests".
Rescued schoolboys are moved from a military helicopter to an awaiting ambulance at a military airport in Chiang Rai, Thailand, July 9, 2018.
But family members have seen at least some of the boys from behind a glass barrier.
Still, health officials were wary of possible infections "because we have never experienced this kind of issue from a deep cave".
The second group of 4 that were pulled out afterwards are aged between 12 and 14.
Classmates of the trapped boys at Mae Sai Prasitsart school, close to the caves, pray after their teacher announced that more of the footballers had been rescued.
The members of the "Wild Boars" team, aged between 12 and 16, were guided to safety through the twisting, submerged passages of the cave complex by a team of worldwide expert divers flanked by Thai Navy Seals over two days in a meticulously planned operation.
Chiang Rai Gov. Narongsak Osatanakorn says the rescue mission began at 10.08am and involves 19 divers. Monday's mission took about nine hours, two fewer than Sunday's.
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In that mission, two divers accompanied each boy, guided by a rope.
Thirteen foreign divers and five members of Thailand's elite navy SEAL unit make up the main team guiding the boys to safety.
The mission to save all the trapped is a race against the clock with heavy rain expected this week which would again flood the tunnels with fast-flowing, rising water.
The Thai navy SEAL unit, which has been overseeing the rescue, confirmed on its Facebook page that the total number of boys brought out was eight.
He said a medic and three Seals in the cave, who have been looking after those trapped, will also come out.
Alluding to that worry, the regional army commander offered his thanks Monday to the rain god Phra Pirun, imploring him to "keep showing us mercy".
The children, ranging between the ages of 11 to 16, had been stuck over two miles inside the cave system in Chiang Rai after a sudden downpour prevented them from making an escape.
Graphics explaining how the divers managed to rescue the four boys have been circulating on social media.
Throughout the process, Musk has entertained the possibility that the sub won't be of any use, but has said that they will leave it with Thai authorities regardless in case it can be useful in a "future situation".