"Six of them came out," the official, who asked not to be named, told AFP.
The boys went missing on June 23 after they had entered the cave complex during fine weather but became trapped when a sudden downpour flooded the narrow tunnels.
"I have received information that six have exited the cave," a senior member of the rescue team told Reuters.
boys to the nearby city of Chiang Rai where they were taken by ambulance to the hospital, he said.