Four more of the boys were carried on stretchers out of the labyrinthine Tham Luang cave on the Myanmar border at dusk on Monday, bringing to eight the number brought out so far after two rescue pushes on successive days.
"The death of the former Thai Navy SEAL illustrates the difficulty of this rescue", Manning said.
Chief of the rescue mission, Narongsak Osottanakorn, declined to comment on the identity of the four people brought out in the evening, saying updates would be supplied at a news conference that is scheduled to be held late on Monday.
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.More news: 'A great meeting': Trump wants North Atlantic Treaty Organisation allies to double defence spending
Nargonsak said this phase may take longer than the previous two rescue missions, which both lasted several hours.
So the challenge for the children lies in keeping in keeping calm while remembering the minutiae of a new skill, Foisey said. Rescue operations have halted for the night and will restart on Tuesday. "We can see that everything is okay as they're eating well", said Thongchai Lertwilairattanapong, Inspector General of the Public Health Ministry.
"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.
The hazardous bid to rescue the boys - aged between 11 and 16 - started unexpectedly on Sunday when the rescue team said conditions were flawless for the evacuation.More news: Trump says Pfizer is rolling back drug ‘price hikes’
They were celebrating a second day of stunning triumph after divers guided four more boys Monday through tight passages and dank flooded caverns to safety.
Last Friday, an ex-Navy SEAL died while placing oxygen tanks along the 4.7-kilometer (2.9-mile) evacuation route.
The final four and their coach are expected to be rescued later Tuesday after 17 nights inside the cave system. He said a medic and three SEALS in the cave, who've been looking after those trapped, will also come out.
Workers have been labouring around the clock to pump water out of the cave, and downpours overnight Sunday and Monday did not raise the water levels inside. They also anxious about dwindling oxygen levels in the cave. "We will check later today whether their eyes have adjusted to light", said Dr Jesada.More news: London awaits Trump's visit, braces for protests
Dr. Richard Harris, an Australian anesthetist who is also well-known as an expert cave diver, has been helping to treat the boys and ensure their safe removal. "If Phra Pirun helps us, we might be able to do it very quickly", Narongsak said, again invoking the god of rain, who is widely revered in Thailand. "But if the rain god doesn't help, then it could be challenging".
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