Rescue teams have so far failed to leak water from the cave and pump it out, while other crews failed to find another entrance to the cave after the cave was no longer accessible from the main entrance.
On Thursday, divers who entered the cave confirmed they had found new footprints inside the cave, but due to heavy rains, rescuers were forced to leave the cave at the risk of a back road.
The players and their coach are likely to be alive, but they have wandered into the Tham Luang Nang Nun cave, which lies next to Chiang Rai, northern Thailand, and is the fourth longest and deepest cave in the country.
"The low oxygen level in the dark cave and the heavy rains have made the task difficult," explained Kamulchai Kocha, head of the Regional Office of Protected Areas.
"The high level of groundwater may have blocked the exit of the cave and the team has been trapped inside," he said.
For its part, the Thai Royal Navy sent 17 special forces personnel to help the local police and officials in the garden of the search.