The boys who were pulled from the cave late Sunday are recovering from their ordeal in a newly converted isolation ward at Chiang Rai Prachanukroh hospital.
The rescue operation began Sunday and has been progressing rapidly.
The second day of the underground rescue attempt began at 11:00am local time (2:00pm AEST). Bancha Duriyapan told a news conference punctuated by applause from the dozens of Thai and foreign journalists and others in attendance. "Good night. Hooyah." The boys and their coach, whose team is known as the Wild Boars, became stranded when they were exploring the cave after a practice game on June 23.
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Over the next three days, the boys were brought out in groups; four on the first day, four on the second and five on Tuesday.
Looming rain was one of the main enemies of the operation, threatening to flood the cave complex in mountainous northern Thailand, although a bewildering array of other dangers could also doom the escape plans.
Narongsak said the rescued boys had not been identified out of respect for the families whose sons were still trapped, adding that the boys were being kept away from their parents due to fear of infection. Contrary to initial reports it's now believed the weakest boys were selected to come out first, following an assessment by Adelaide cave diver and anaesthetist Dr Richard Harris.
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"Adolescents are especially social creatures, and having friends with them as well as their coach would be a tremendous help", said David Spiegel, a professor of psychiatry and behavioral sciences at Stanford University's medical school. Experts say it's crucial for their survival that the remaining boys are told of the positive news.
The first stage of the mission ran "smoothly" and the rescued boys were in "good health", according to the Thai authorities.
Four boys and the coach remain trapped in the cave.
Following the initial rescues Sunday, the operation was paused for about 10 hours while divers replenished air tanks along the exit tunnel.
A heavy but brief downpour hit the area Monday morning, but authorities said that did not change the water level in the cave, as workers continue to pump water out. The dive to rescue the boys in the Tham Luang Cave area is risky and requires divers to hold them close and dress them in scuba gear, Reuters reported.
Another video from Thai PBS showed an ambulance arriving at the hospital in Chiang Rai. "This morning they complained that they are hungry and they asked for fried basil with rice", said rescue mission commander Narongsak Osottanakorn.
On Friday, the death of a former Thai navy SEAL underscored the risks.
The rescued kids are now in the hospital, where they should receive the proper care before being released to their families.