
Four more men were freed from a flooded cave in Laos during a continuing rescue operation, but two of the seven villagers who entered the tunnels remain missing. The cave system is extremely confined, with some chambers about 50 cm wide, complicating underwater evacuations. Authorities say they are investigating a possible knocking response deep in the system and have shifted attention to a newly found shaft that could change access options for reaching those still unaccounted for.
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