Two more ambulances have been seen leaving the site of a flooded cave in northern Thailand where young members of a soccer team and their 25-year-old coach have been trapped for more than two weeks.

That brings to three the number of ambulances that have left the site Monday during the second day of a high-risk operation to bring the boys out of a labyrinth cave system made up of tight passageways and flooded chambers.

On Sunday, teams of divers brought out four of the trapped boys but waited several hours before confirming their safe rescue.

Authorities have been tightlipped about the progress of Monday's operation.

2 more ambulances leave site of Thai cave