Early this week, rescuers discovered vital signs, raising the possibility that the workers might still be alive.
Despite five days of rescue efforts, three foreign workers trapped inside a collapsed train tunnel have died, according to Thai authorities.
As recently as Thursday, the men—two from China and one from Myanmar—were still believed to be alive.
On Saturday, a section of the tunnel they were constructing collapsed in Pak Chong district, some 200 km (124 mi) northeast of Bangkok, trapping them.
Authorities declared all three dead on Friday, and preliminary findings point to a lack of oxygen as the cause.As recently as Thursday, the men—two from China and one from Myanmar—were still believed to be alive.
On Saturday, a section of the tunnel they were constructing collapsed in Pak Chong district, some 200 km (124 mi) northeast of Bangkok, trapping them.
Authorities declared all three dead on Friday, and preliminary findings point to a lack of oxygen as the cause.
