An ambulance carrying one of the boys rescued from the Tham Luang cave network on Sunday. Seven boys remain trapped inside with their coach.
American tech entrepreneur Elon Musk has proposed a mini-submarine to save the boys trapped inside a flooded Thai cave, floating the idea on social media while linking it to his space exploration business.
Anupong Paojinda said officials were meeting on Monday morning about the next stage of the operation and how to extract the remaining eight boys and their football coach from the cave in the country's north.
On Monday afternoon, Osatanakorn said the same group of divers involved in Sunday's rescue operation had entered the cave at 11 a.m. local time to rescue the group still stuck inside. It was unclear who was inside the ambulance or the helicopter.
Eight boys in total have been extracted from a cave in Mae Sai after Thai divers resumed operations in the cave rescue at 11am (6 am SAST) on Tuesday, according to worldwide news reports.
The boys were rescued as part of an operation that officials said began at 11am.
Once that task is complete, the boys are then handed over to a team of specialist who are assisting them through the remainder of the cave, much of which they can wade through.
There are now five members of the Wild Boar football team now left in the cave.
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Four boys were successfully rescued from the Tham Laung cave area on Sunday in a delicate and lengthy operation. Each boy is being accompanied by two divers and it takes hours to negotiate the flooded tunnels through the dark, murky water.
Those still inside the cave are perched on a small muddy ledge 4 kilometers (2.5 miles) from the entrance, surrounded by floodwater and with a limited supply of oxygen. Two divers were assigned to each child to help them navigate the unsafe, narrow passageways.
The divers will stop off at scheduled points throughout the journey stocked with extra oxygen tanks, allowing the crew to replenish themselves and the boys they are guiding.
Workers have been labouring around the clock to pump water out of the cave, and downpours overnight Sunday and Monday did not raise the water levels inside.
On Monday, skies were largely clear over the site but rain has been forecast for at least the next three days.
The four rescued boys have been transported to a Chiang Rai hospital for treatment and medical evaluations, reported CBS.
"This morning they said they were hungry and wanted to eat khao pad grapao", Narongsak said referring to a Thai dish of meat fried with chilli and basil and served over rice. Relatives were able to see them through a glass partition, the governor said. "We have to quarantine them for a little while due to fear of infection".
"The next step is to make sure those kids and their families are safe because living in a cave has a different environment, which might contain animals that could transmit any disease", a hospital statement said.
Cave rescue experts have said they consider an underwater escape to be a last resort, especially with people untrained in diving. Visitors would need to wear sanitized clothes and stay two meters away from the children.