The second rescue involved numerous same divers who evacuated the first four boys Sunday, former Chiang Rai governor Narongsak Osotthanakorn told reporters. When the missing soccer team was located on July 2, rescue medics who reached them evaluated all the boys and their coach and divided them into three categories: red for critical condition, yellow for serious condition and green for stable condition.
He said the four boys rescued on Sunday were "hungry but in good health".
Last week, Musk tweeted that he was sending a team of SpaceX and Boring Company engineers to Chiang Rai in northern Thailand on Saturday to help rescue efforts, supplying technology such as Tesla Powerwall batteries and pumps for removing water.
Narongsak said the first four 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. Four boys and their coach remain in the cave, but it's unclear if authorities will try to extract them in a group of four or try to take the five out in a single mission.
The boys, ages 11-16, and their 25-year-old coach became stranded when they went exploring inside after a practice game.
Four ambulances and a convoy of other vehicles arrived at the cave site Tuesday morning as rains hit the region.
Interior Minister Anupong Paojina said the same divers who participated in Sunday's rescue conducted the operation Monday because they are familiar with the cave conditions.
The four boys rescued on Sunday were each accompanied by two divers as they were gradually extracted from the cave.
Four of the boys were safely rescued on Sunday after rescuers carried out a risky operation, amid fears the waters will rise again to a unsafe level.
The condition of the boys and rescuers is unknown at this time.
Trump adviser says two Supreme Court candidates are tougher sell
If she's chosen and confirmed, it would be the first time four women would serve together on the nine-member Supreme Court . As a judge on the US Court of Appeals in Washington he has written opinions on some of the nation's most sensitive issues.
Eight more boys and their coach need to be removed from the cave, and the rescue has resumed, CNN reports.
Monsoon rains have started falling again, causing water levels inside the cave to rise, squeezing the boys in an ever shrinking space inside the cave, and causing oxygen levels to drop.
The death of a former Thai Navy SEAL diver on Friday, who ran out of oxygen, underscored the danger of the mission, which has been termed a "war against time and rains".
A total of eight boys have now been taken out of the Tham Luang Nang Non cave, according to the Thai navy SEAL group, which has a leading role in the rescue operation.
Early tests indicate all of the boys could be suffering from lung infections, but only two of the first four boys were confirmed.
"Imagine marathon runners. It is like when they reach the finish line exhausted", said the source.
That sense of accomplishment was also reflected in the message posted Monday night on the Thai Navy SEALS's Facebook page announcing the latest rescues.
All preparations, including replacing the oxygen cylinders positioned along the route out in the cave, take at least 20 hours, he said.
"Although his technology is good and sophisticated, it's not practical for this mission", Osatanakorn said after the press conference.
"But if the rain god doesn't help, then it could be challenging".