A crack team of foreign divers and Thai Navy SEALS has been guiding the boys out through almost 4 km (2.5 miles) of sometimes submerged, pitch-dark channels.
"They (all the boys) will have to stay in the hospital for one week to wait for their results and to see if anything changes", he said. Helicopters transporting the boys roared overhead. They were immediately sent for a medical examination, but there has been no news about their condition.
"If the rain god helps us, then we may be able to work fast", the head of the rescue mission, Narongsak told reporters.
The Tham Luang cave system will now be closed for some time, prime minister Prayuth Chan-o-cha said. "Not just in Thailand, but around the world".
"It's really a miracle", Payap said. We ask to pray that this operation is a success. Among them was Umporn Sriwichai, an aunt of assistant coach Ekapol Chanthawong. "I still didn't know if it was a casualty or if it was a kid". Each of the rescued boys has been guided through the dark, narrow cave by a pair of divers. A former Thai Navy diver lost his life while on a re-supply mission inside the cave to support the rescue.
Cave-diving experts had warned it was potentially too risky to dive the youngsters out.
The rescued boys had not been identified out of respect for the families whose sons were still trapped, officials had said.
They were discovered 10 days later by two British divers, but a rescue had seemed all but impossible due to the necessity of swimming through water-filled passages.
Officials revealed on Tuesday that the first eight boys rescued from the cavern were in good health overall and some requested bread slathered with chocolate for breakfast. If they're chloroformed, how could they come out?
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He said it was a "wonderful moment" as he saw the boys emerge from the cave.
The boys, aged 12-16, were the first to be extracted on Sunday and Monday, while the final four and their coach spent a 17th night inside.
The boys and their coach are expected to spend at least one week at Chiang Rai hospital for observation and protection against possible infections.
Walker tweeted: "Amazing news that all of the Thai kids are out of the cave safely!"
A spokesperson from the Thai public health authority said that they were in "high spirits" and also claimed that as they are football players, they have high immune systems. "We wish them all the best for the future".
It was clear doctors were taking a cautious approach.
Thailand's navy SEALs say the four boys and coach rescued on Tuesday, after other rescues in the previous two days, are all safe.
John Tangkitcharoenthawon, a local village chairman, was bursting with happiness over the successful rescue.
Onlookers in Chiang Rai, Thailand, watch and cheer as ambulances transport some of the rescued schoolboys from a cave where they were trapped for two weeks.