Each operation has taken at least nine hours.
Trained divers from the USA, the U.K., Canada and elsewhere flew to Thailand to offer their expertise and help escort the team out through the flooded cave passages.
Asked if their actions might be seen as insensitive at such a delicate time, Smith said: "There's going to be other production companies coming in so we have to act pretty quickly". For 17 days, Thai navy SEALS, divers and engineers delivered food, medical care and oxygen to the group while working to free them.
Chief of the rescue mission, Narongsak Osottanakorn, declined to comment on the identity of the four people brought out in the evening, saying updates would be supplied at a news conference that is scheduled to be held late on Monday. British divers found them in a partly flooded passage several kilometers inside the cave on July 2. Worldwide experts set up rescue communications, while Thai villagers set up coffee stalls and massage stations.
Rescuers have been pumping out flood waters but scattered monsoon rain has raised the danger of more water percolating back down through the limestone and coursing through the tunnels.
"Although his technology is good and sophisticated, it's not practical for this mission", the rescue chief said.
Tension that had gripped this small town near the site finally broke Tuesday evening as the last of the ambulances turned on their lights and sirens and raced downhill from the cave. "All the thirteen Wild Boars are now out of the cave", the post read. The hospital has sent test samples from the boys to a lab in Bangkok.
But a person with knowledge of the rescue said just before the twelfth person was spotted, that in all, 11 of the 13 had been brought out.
Hours after the rescue was confirmed, President Trump tweeted his congratulations, adding, "Such a handsome moment - all freed, great job!" "Such a lovely moment - all freed, great job!"
Diagram of how divers are carrying out a rescue of the 12 Thai boys and their football coach who were trapped in a cave on June 23.
They wore face masks and were tied to buddy divers who carried their oxygen tanks, guiding them through more than two kilometres of narrow, dark corridors using torches and guide ropes.
Highlighting the dangers, a former Thai Navy SEAL died Friday while replenishing the canisters.
"The kids are footballers so they have high immune systems", Jesada said.
One of the boys had a heartbeat that was too slow, and some had low white blood cell counts, but they have since been stabilised.
But two boys had "suspected lung problems which are being investigated", she added.
The rescued boys are being quarantined in case any of them contracted infections while inside the cave.