The leader of a Thai volunteer group helping to extract seven people trapped in a cave in Laos says more oxygen tanks will be needed to complete the rescue mission.
The seven Lao nationals entered the cave in central Laos' Xaisomboun province last week to look for gold, but a landslide triggered by heavy rain blocked their exit, according to a local volunteer group and the state-run Lao Phattha News.
At least five have been found alive so far, but none of them has yet been rescued from the chambers of the cave.
