Chiang Rai governor Narongsak Osotthanakorn said at a press conference on Monday that the effort would involve the same divers. Sunday's mission took nine hours and plenty of energy, with each child being accompanied by two divers along the way.
Complicated rescue: Thirteen foreign divers and five members of Thailand's navy SEAL unit are taking part in the operation to free the young soccer players and their coach.
Authorities have been tightlipped about the progress of Monday's operation. Thai authorities are hustling to draw out water from the flooded cave before more rains are forecast to hit the northern region.
By 8:23pm, the last boy of the day had arrived safely at the hospital after being evacuated from the scene by helicopter.
Reporters at the scene said three other boys had been extracted, but officials have yet to confirm that.
The boys, aged between 11 and 16, went missing along with their 25-year-old coach on Jun 23, after they set out to explore the Tham Luang cave complex in a forest park near the border with Myanmar.
There are now five members of the Wild Boar football team now left in the cave.
The extraction of the four on Monday followed a similar pattern to the previous day, with the youngsters emerging in quick succession just before nightfall after navigating a treacherous escape route of more than four kilometres (2.5 miles).
It was not clear who was inside the ambulance or the helicopter. "All eight are in good health, no fever. everyone is in a good mental state", Jedsada Chokdamrongsuk, permanent secretary of the public health ministry, said at Chiang Rai hospital where the boys were recuperating on Tuesday morning.
The second operation started at 11 a.m. local time Monday.
Eight boys are still inside the cave and along with the team coach.
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The potential for rising water and the dwindling oxygen levels added to the urgency of getting the team out.
The boys are all healthy and safe, according to multiple reports.
The rescued boys were immediately taken to hospital to undergo medical tests.
It's a process that can take several hours. "I've been involved in cave rescue for 30 years and I can not even think of one that was more complicated".
Elon Musk's Space X rocket company is testing a "kid-sized submarine" that could be sent to help boys trapped in a flooded Thailand cave.
The film and television studio also posted a video of Scott on their official Twitter handle.
Pad kra pao, a Thai chicken dish, was said to be the first meal that the four boys asked for.
The first four boys, from the group of 13, including the coach, were rescued on Sunday. Since then, an worldwide team of engineers, rescuers and divers has been delivering supplies and food to the children and their coach ― and mulling ways to best help them escape.
The boys became trapped in the cave on 23 June after heavy rains caused flooding, but were found alive last week by divers.
Narongsak on Sunday described their journey out, escorted by elite divers, as "smooth". They were quickly transported to a hospital in the town of Chiang Rai, the provincial capital. They have not been reunited with their families yet due to infection concerns.
