Till now eight boys are rescued from the Thai cave complex.
"At this moment (there are) no worrisome conditions, everyone is safe", Jesada Chokdamrongsuk, Thailand's health ministry permanent secretary, and told reporters.
He was taken by helicopter and then ambulance to the hospital in Chiang Rai were the first four boys, who were rescued on Sunday, are now being held in quarantine as they undergo tests.
"The kids are footballers so they have high immune systems", Mr Jesada said.
The boys had a good appetite but were mainly being given bland, easily digestible foods. However, doctors later relented after some of the boys asked for bread with chocolate topping.
Rescued schoolboys are moved from a military helicopter to an awaiting ambulance at a military airport in Chiang Rai, Thailand, July 9, 2018. Photograph: Soe Zeya Tun/Reuter.
Divers have begun the third phase of the rescue of a youth soccer team trapped for more than two weeks in a flooded cave in northern Thailand and aim to bring out the last four boys and their coach Tuesday, the top rescue official said.
Rafael Nadal Topples Juan Martin Del Potro to Advance at 2018 Wimbledon
Del Potro was straining to stay in touch in almost every point, and his gambling instincts drove him to explore the white lines. There was a look of glee in Del Potro's sometimes sad eyes, and his lumbering between-points walk had a bit more energy to it.
Somboon Sompiangjai, 38, the father of one of the trapped boys, said parents had been told by rescuers that the "strongest children" would be brought out first.
The mission to save all the trapped is a race against the clock with heavy rain expected this week which would again flood the tunnels with fast-flowing, rising water.
Chiang Rai Gov. Narongsak Osatanakorn said Tuesday's rescue operation began just after 10 a.m. and involves 19 divers.
The operation led by British cave divers alongside Thai Navy SEALs will have to return to the cave tomorrow, racing time, dropping oxygen levels and the rains, to rescue the remaining four boys and their coach.
The boys and their coach, all from the "Wild Boars" soccer team, became trapped by rainy season floodwater on June 23rd when they had set out to explore the vast cave complex after soccer practice.
Keeping all the boys calm in a disciplined environment in a pitch-black cavern all that time was likely the result of the coach's training: as a Buddhist monk. "It is made of rocket parts & named Wild Boar after kids" soccer team.
Due to fear of spreading disease, medical authorities are still not allowing the boys to have direct contact with their parents, who had to wear surgical robes and masks and were not allowed to hug their sons when visiting them in hospital. Musk posted several videos to his Twitter account that show the submarine being tested in a swimming pool. It is now unclear whether Musk or his technology will be used in the rescue efforts, but Musk confirmed via tweet that the submarine is in Thailand and ready to be used if needed. "Leaving here in case it may be useful in the future".