It is reported that the remaining four youngsters and their coach will remain in the cave for another night.
The acting governor of the province's capital, Chiang Rai, Narongsak Osatanakorn said they have been training on the plan for several days and the team successfully managed to decrease the flood level.
Divers have resumed operations to bring out the remaining members of the group.
Thai soldiers walk out from the Tham Luang cave area as operations continue for the 8 boys and their coach trapped at the cave in Khun Nam Nang Non Forest Park in the Mae Sai district of Chiang Rai province on July 9, 2018.
In a statement released by the government, Mr Paojinda said officials were meeting Monday morning local time about how to extract the remaining nine people from the cave in the country's north. Mr Paojinda said more air canisters were being placed along the underwater route to where the boys and their coach have been trapped for nearly two weeks.
Authorities have said the mission could take three or four days to complete.
But he could not confirm if all five would come out today.
Karadzic, the Danish diver, said preparations had been made with air tanks and spaces identified for those being rescued to go if needed.
After his visit, he went to Chiangrai Prachanukroh Hospital to visit the rescued boys.
On Sunday, as news of the first rescues flashed worldwide, President Donald Trump tweeted for the first time about the soccer team, saying the United States was working "very closely with the government of Thailand to help get all of the children out of the cave and to safety".
The first four members of the Wild Boar soccer team were rescued Sunday and are in a hospital.
The rescue has been underway ever since and eight of the boys are now out thanks to a team of expert divers.
Among the ideas were drilling an escape route through the mountain, or leaving them for months until the monsoon season ended and the flooding subsided. Monsoon flooding blocked off their escape and prevented rescuers from finding them for nearly 10 days.
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Among these were that none of the boys had scuba diving experience, and that they could easily panic while swimming underwater across twisted passageways in darkness.
One of the biggest concerns in the rescue operation is an area of the cave that is just 15 inches across so the boys have to separate from the divers in order to fit through.
These divers have been working together to help guide the boys through the long, hard passages of the cave.
Underscoring the danger in the fast-moving waters, a former Thai navy SEAL died on Friday while moving the canisters, reportedly because of lack of oxygen.
The rescue began on Sunday.
Two helicopters wait near the cave for more evacuations of the boys and their soccer coach on Monday.
Officials told Reuters that Monday's rescue operation would take between 10 and 20 hours. There was no word on the condition of the fifth boy brought out earlier on Monday.
Pad kra pao, a Thai chicken dish, was said to be the first meal that the four boys asked for.
At the hospital in Chiang Rai, green canvas sheets had been put up to block the entrance from view. "But they still need to be kept away from their parents and others due to fear about infection", he said.
He also urged the media to behave respectfully.
TRT World's John Joe Regan has the latest from Thailand.
The four boys pulled from the cave Sunday in an urgent and risky operation that involved them diving through the cave's tight and twisting passages were in good health.