Divers are carrying out what they hope is a final mission to save the remaining boys and their soccer coach trapped for more than two weeks in a flooded Thai cave, the rescue leader said today, as health experts gave the eight already brought out a chocolate treat and described them as being in good spirits.

At mid-afternoon, an ambulance was seen leaving the cave site. Officials the previous two days had not confirmed rescues until the day’s operation is over.

Chiang Rai Governor Narongsak Osatanakorn said today’s intricate and high-risk operation began just after 10 a.m. and involves 19 divers. A medic and three Thai Navy SEALs who have stayed with the boys on a small, dry shelf deep in the flooded cave will also come out, he said.

“We expect that if there is no unusual condition, the four boys, one coach, the doctor and three SEALs who have been with the boys since the first day will come out today,” he told a news conference, to loud cheering.

Three have already been rescued today, leaving one player and the coach to be rescued.

Nargonsak said this phase may take longer than the previous two rescue missions. The first and longest mission took 11 hours.

The eight boys brought out by divers over the previous two days are in “high spirits” and have strong immune systems because they are soccer players, a senior health official said.

Doctors were being cautious because of the infection risk and were isolating the boys in the hospital. They did get a treat they’d requested, however: bread with a chocolate spread.

The plight of the boys and their coach has riveted Thailand and much of the world – from the heart-sinking news they were missing to the first flickering video of the huddle of anxious yet smiling boys when they were found 10 days later by a pair of British divers. They were trapped in the Tham Luan Nang Non cave that became flooded by monsoon rains while they were exploring it after a soccer practice June 23.

At a news conference, Jedsada Chokdumrongsuk, permanent secretary at the Public Health Ministry, said the first four boys rescued, aged 12 to 16, are now able to eat normal food, though they can’t yet take the spicy dishes favored by many Thais.

Two of the boys possibly have lung infections, but all eight are generally “healthy and smiling,” he said.

“The kids are footballers so they have high immune systems,” Jedsada said. “Everyone is in high spirits and are happy to get out. But we will have a psychiatrist to evaluate them.”

It could be at least seven days before they can be released from hospital, Jedsada told a news conference.

Family members have seen at least some of the boys from behind a glass isolation barrier, and Jedsada said doctors may let the boys walk around their beds today.

It was clear doctors were taking a cautious approach. Jedsada said they were uncertain what type of infections the boys could face, “because we have never experienced this kind of issue from a deep cave.”

If medical tests show no dangers, after another two days parents will be able to enter the isolation area dressed in sterilized clothing and staying six feet away from the boys, said Tosthep Bunthong, Chiang Rai Public Health Chief.

The second group of four rescued on Monday are aged 12 to 14.

At least nine ambulances and a convoy of other vehicles were at the cave site today.

Heavy rains in the morning cleared during the day, a reassuring sign for rescuers who have feared monsoon rains could imperil the rescue.