The second shift of the rescue effort to evacuate the trapped soccer team saw a team of 18 Thai and worldwide divers guide four boys about 2 1/2 miles (4 kilometres) to the cave's entrance using a 3-mile (4.8 kilometre) rope on Monday.
Expert divers have so far rescued eight boys from a flooded cave in Thailand, leaving another four youngsters and their football coach to be brought to safety.
Four boys and the coach are still to be rescued.
Reuters reported that eight players have been rescued in risky attempts by a world-class global team of divers.
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Four additional boys, along with their 25-year-old soccer coach, remain in the cave and await the next round of rescues, CNN reported.
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Narongsak Osottanakorn, the rescue mission chief, said that the same divers who carried out the operation yesterday are also involved in the second phase, along with additional personnel.
Authorities say expected rains may force a complex rescue quicker than first thought.
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.
Headcam footage shows the treacherous path the rescuers must navigate in order to retrieve the stranded school boys and their coach.
Their families were being kept at a distance because of fears of infection and the emaciated-looking boys were eating a rice-based porridge because they were still too weak to take regular food, authorities said.
Rain had continued overnight but the governor's initial hope was that the third stage of the rescue could be performed faster than the rescues on Sunday and Monday, when four boys were freed on each day.
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The Thai Navy Seals, who have played a critical role in the treacherous rescue efforts, confirmed that four more boys were retrieved from the Tham Luang Nang Non cave.
The first 4 boys who were rescued the other day, aged between 12 and 16, are now allowed to eat normal food once again.
Four were rescued on Monday, and the first four extracted on Sunday. Each boy was accompanied underwater by two divers helping them navigate the dark, murky water in the flooded tunnels.
The eight boys rescued after being trapped for more than two weeks were described as generally healthy.
Tuesday, he tweeted from Thailand that he had been in the caves and that a mini-sub made from rocket parts and named "Wild Boar" after the boys' soccer team, was ready if needed and would be left in Thailand in case it could be of future use.
So the challenge for the children lies in keeping in keeping calm while remembering the minutiae of a new skill, Foisey said.
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