Four boys and their 25-year-old football coach "will be extracted on Tuesday".
Tuesday's operation began just after 10 a.m.
"We expect that if there is no unusual condition. the 4 boys, 1 coach, the doctor, and 3 SEALs who have been with the boys since the first day will will come out today", he told a press conference to loud cheering.
The identity of the rescued boys has not been confirmed by authorities.
Rescue crews ready themselves to go back into the cave. Nine people remained trapped in the cave, including the team's coach, as of Monday morning.
Mr Narongsak said about 100 people were involved in the operation on Tuesday, including the 19 divers newly sent into the flooded cave.
A crack team of foreign divers and Thai Navy SEALS guided the boys during a nine-hour operation through almost 4 km of sometimes submerged, pitch-dark channels from where they have been trapped for more than a fortnight.
One of the boys appeared to have lung inflammation, and another was admitted with a slowed heart rate but both are improving, said Dr. Jedsada Chokedamrongsook, the permanent secretary of the Thai Health Ministry. Musk, who has been documenting his efforts to build the aforementioned sub to possibly help in the rescue, still clearly felt like he had something to offer.
The boys will remain in quarantine because of a fear of infection, and it's understood they have only been able to speak to family members through a window.
One of the concerns, health authorities could be holding is the risk of "cave disease" - histoplasmosis - which can be contracted by breathing in bat or bird droppings.
Elon Musk hoped to save the young soccer team trapped in a northern Thailand cave, over the weekend building a rescue submarine that he thought could act as an escape pod for the children and their coach.
Phuwadech Kamnguen, a 14-year-old best friend of one of the trapped boys, said he's looking forward to eating KFC with the team again. "We will celebrate together finally".
Then came the letters carried out by divers who took oxygen, food and medicine to the boys' refuge as experts evaluated whether to dive them out or provision them, perhaps until monsoon rains usually subside in late October.
The footballers still awaiting rescue are about two kilometers further in, at a point very hard to access.
The painstaking rescue has required breaks to allow the group of 18 elite divers to rest and replenish the cave with oxygen for the remaining soccer team members, ABC News reports.
Divers, engineers, medics and others have flown in from around the world to assist.
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