As the eight boys already rescued from Thailand's Tham Luang Cave convalesce in a Chiang Rai hospital, an worldwide rescue team has entered the flooded cave system for the third consecutive day to free the four children and their 25-year-old soccer coach still trapped inside.
Four boys were rescued on Monday evening following the four who were bought safely out of the cave on Sunday.
Doctors said the boys are being carefully.
Jesada Chokdumrongsuk, permanent secretary at the Public Health Ministry, told a joint press conference on Tuesday morning that despite being healthy, the boys have to remain in hospital for at least a week.
Officials said they were thankful to Musk for his help but said there was no chance of using the mini sub to rescue the remaining boys.
Divers have rescued eight of the boys. But officials waited several hours before confirming their rescue.
He said a medic and three SEALS in the cave, who've been looking after those trapped, will also come out.
Local news website Khao Sod English said the tenth boy emerged from the cave at 4.33pm (7.33pm AEST), with the eleventh soon following at 5.13pm (8.13pm AEST).
The group would be kept under observation in hospital for a week. The diver, the first fatality of the rescue effort, was working in a volunteer capacity and died on a mission to place air canisters along the passage to where the boys are, necessary for divers to safely travel the five- to six-hour route.
Two boys and their 25-year-old coach remain in the cave.
"Potentially deadly histoplasmosis - a lung infection also known as "cave disease" and "spelunker's lung" caused by breathing in spores from animal waste - is one of several illnesses that medical experts are anxious the 12 boys and their coach could have contracted while trapped deep in the subterranean system".
The second group to be rescued on Monday have low body temperature and slow heartbeat.
Two of the rescued were reported to be battling a lung infection, although the boys were reported to be "cheerful" by medical professionals.
Mr Narongsak allayed concerns that recent heavy rain might have raised water levels, saying conditions were "as good as yesterday" "We should hear good news again", he added.
Chiang Rai acting Gov. Narongsak Osattanakorn said the second phase began at 11 a.m. and authorities "hope to hear good news in the next few hours". If the rain god helps us, then we may be able to work fast.
Four more boys were brought out Monday from the flooded cave in Chiang Rai after four others were rescued on Sunday.
The boys and the coach were found more than a week after they became stuck on a small, muddy patch deep in the cave's network of chambers.