"The machine has already been delivered to Thailand and ready to use in the rescue operation in a partially flooded cave Khao Luang", - he wrote.
Rescue teams plan third day of mission to free remaining members of Wild Boars soccer team; Jeff Paul reports from Thailand.
Four more boys were brought out Monday from the flooded cave in Chiang Rai after four others were rescued on Sunday.
They have no fever or serious ailments, said public health permanent secretary Dr Jesada Chokedamrongsuk at a press conference on Tuesday (July 10).
Hospital officials said the boys could eat bland foods, but not anything spicy. They did get a treat, however: bread with chocolate spread that they'd requested.
People on the street cheered and clapped when ambulances ferrying them on the last leg of their journey from the cave arrived at a hospital in Chiang Rai city in far northern Thailand near the Myanmar border. Photograph: Soe Zeya Tun/Reuter.
The first eight boys rescued are now at a hospital, and they are in good conditions physically and mentally, Thai health officials said here on Tuesday.
Calling the rescue effort "17 days that will be remembered forever", acting Chiang Rai Gov. Narongsak Osottanakorn announced that all members of the team, as well as three SEALs and a medic who were staying with them, had safely left the cave and were healthy.
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But with oxygen levels inside dropping to risky lows and the prospect of heavy rains flooding the area completely, authorities decided they had to move quickly and take the group out through the water-filled tunnels.
Narongsak Osatanakorn says the rescue mission began at 10.08 a.m. and involves 19 divers.
A crack team of foreign divers and Thai Navy SEALS guided four boys on Sunday and a further four on Monday through narrow, submerged channels from the muddy bank deep inside the Tham Luang cave where they had been stranded for more than two weeks.
They were trapped in the Tham Luan Nang Non cave that became flooded by monsoon rains while they were exploring it after a soccer practice on June 23.
"All five will be brought out at the same time today", said the head of the rescue mission, Narongsak Osottanakornon, on Tuesday. Musk posted several videos to his Twitter account that show the submarine being tested in a swimming pool.
And Gianna Infantino, the president of Federation Internationale de Football Association, soccer's governing body, has invited the boys to the World Cup final in Moscow on Sunday.
In a series of tweets in the past few days, Musk chronicled the development of his custom-built mini-sub. "Leaving here in case it may be useful in the future".