On Sunday, officials decided they could no longer wait, saying conditions were "as flawless as they will be" for a rescue attempt.
The footballers still awaiting rescue are about another two kilometres further in, at a point very hard to access.
Two of the boys possibly have a lung infection but all eight are generally "healthy and smiling, " he said.
"The equipment they brought to help us is not practical with our mission", Chiang Rai Gov. Narongsak Osotthanakorn, the head of the rescue efforts, said of the billionaire's technology, according to BBC.
The former Governor of the Chiang Rai, where the operations are taking place, Narongsak Osatanakorn, said: "We expect that if there is no unusual condition. the 4 boys, 1 coach, the doctor, and 3 SEALs who have been with the boys since first day will come out today".
Another four boys were rescued Monday. In a drama that has received press coverage across the world, two British cave rescue specialists, workign with Thai military teams, found the 13 on a bank in a partly flooded chamber several kilometers inside the complex on Monday, last week.More news: How to shop Amazon Prime Day deals without paying for Amazon Prime
Even as a massive operation is underway to rescue the remaining members of the Thai soccer team trapped in a flooded cave, a diver involved with the mission highlighted the risks involved in carrying out the rescue.
As the 12 soccer players and their coach emerged from a Thailand cave after a more than two-week ordeal, there is already a movie in the works.
It could be at least seven days before they can be released from hospital, said Jedsada Chokdumrongsuk, permanent secretary at the Public Health Ministry. Six of the 12 boys on the soccer team attend her school.
A huge rescue operation is now entering its third day. Those evacuated so far have been taken to hospital in Chiang Rai for treatment and observation. (40 kilograms), which is "light enough to be carried by 2 divers, small enough to get through narrow gaps", Musk tweeted, adding that the contraption is "extremely robust". Above them, a bald eagle symbolizing the United States flaps its wings next to the face of Iron Man - a reference to "Mr. Elon Musk", who sent engineers from his companies Space X and Boring Co.to help with rescue efforts last week. The team became trapped on June 23 when rising flood water confined them deep inside the cave.
He posted video of divers escorting the pod during testing in a Los Angeles swimming pool.
There are concerns they may have consumed contaminated water, while bird or bat droppings could cause infections.