According to Wikipedia:
In June and July 2018, a widely publicised cave rescue successfully extricated members of a junior football team trapped in Tham Luang Nang Non cave in Chiang Rai Province, Thailand.
An article by news.com.au contains the following passage (emphasis is mine to stress most relevant parts):
But ABC Australia Southeast Asia correspondent Liam Cochrane says in his new book, The Cave, the boys were in fact drugged with ketamine and handcuffed on their journey out of the cave.
It was revealed during the rescue that the boys were mildly sedated to stop them panicking during the rescue, but the truth is more complex.
The boys received far stronger drugs, and they were handcuffed behind their backs to stop them ripping off their face mask should they wake up.
“To calm nerves, the parents were told the boys were being taught how to dive and the media reported that each of them would be tethered to an air hose and then swim out with one rescue diver in front and another behind,” Cochrane writes in his book.
“This was untrue.
“Those who’d been inside the flooded tunnels knew there was no way a child who had never dived before could make it through the muddy and treacherous obstacle course.
“The only hope was to sedate them, put oxygen-fed masks with silicone seals over their faces and let the expert cave divers carry them out.
“But it was crucial that the masks fitted tightly, otherwise they might drown.”
Question: were these boys unconscious during the diving part of the rescue operation?