A local government official confirmed the rescue while a police source, who also did not want to be named, said "the ninth and tenth were about 20 minutes apart". But rescue officials were also anxious about dwindling oxygen levels in the cave.
Divers are on their way in the third rescue journey deep into a flooded cave with a mission to complete the job and save everyone inside.
It's the news the entire world has been waiting more than two weeks to hear.
The final push to bring home four boys and their soccer coach by a crew of worldwide and Thai divers began in earnest on Tuesday.
Depicting boys stuck inside the cave, the message on the sculpture read, "We pray for the safe rescue of the Thai boys".
Tuesday's operation began just after 10 a.m.
After they were found on July 2, officials cautioned it could take some time to get them out, but authorities made a decision to act with heavy rains forecast to hit the region.
Rescuers freed the last four of 12 Thai boys and their soccer coach from deep inside a flooded cave on Tuesday, a successful end to a perilous mission that gripped the world for more than two weeks.
Narongsak Osatanakorn, the head of the joint command centre coordinating the operation announced at a press conference on Monday: "We are so happy that today we could rescue another four kids". He said a medic and three SEALS in the cave, who've been looking after those trapped, will also come out.
Three Thai Navy SEALS and a doctor who have watching over them since the team was found still need to get out safely.
The eight boys brought out on Sunday and Monday were in good health overall and some asked for chocolate bread for breakfast, officials said earlier.
He said they would need to keep at least two metres away for their boys for at least 48 hours, until "we are sure there is no infection, then they can visit them normally".
"For the second lot of patients arriving last night, whose ages range from 12-14, they arrived with very low body temperature, and one of them had a low heart rate", he said.
The parents are able to see their kids through a glass window, but they are not allowed to make physical contact with them because docs are concern about infection.
Four boys and their soccer coach remain in the cave.
Graphic: The Thai cave complex where four boys and their soccer coach remain trapped is expansive, stretching about 10 km.
Interior Minister Anupong Paochinda told reporters that the boys rescued Sunday are in hospital and doing fine but require thorough medical checks.
Four more of the boys were carried on stretchers out of the labyrinthine Tham Luang cave on the Myanmar border at dusk on Monday, bringing to eight the number brought out after two rescue pushes on successive days.
Eight members of the football team had already been rescued by experienced divers from the cave in Tham Luang before Tuesday.
The CEO of Tesla and SpaceX was - if his Twitter and Instagram accounts are to be believed - in Thailand on Monday touring the cave where a team of 12 soccer players, aged 11 to 16, became stuck with their coach on June 23.
VideoOne of the divers on the rescue team in Thailand explains the difficulty of getting the boys out.