MAE SAI, Thailand (AP) — A total of four ambulances have left the area around the flooded cave in northern Thailand where members of a youth soccer team have been trapped for more than two weeks, suggesting eight of the 13 trapped people have now been extracted.

Authorities have been rushing to extract the boys, ages 11-16, and their coach from the cave as the annual monsoon bears down on the mountainous region in far northern Chiang Rai province. Workers have been laboring around the clock to pump water out of the cave, and authorities said Monday that heavy downpours overnight did not raise water levels inside.

The four boys pulled from the cave Sunday in an urgent and dangerous operation that involved them diving through the cave’s dark, tight and twisting passages were happy and in good health, authorities said.