Workers thought to be trapped in the tunnels and underground areas of about half a dozen hydropower projects in Nepal following devastating flash floods

Rescuers have reached previously inaccessible areas as Nepal appeals for international aid and continues to attempt to rescue 100 workers trapped in a hydropower plant tunnel.

More than 100 people remain trapped in a hydropower tunnel in Nepal, while rescuers across the border in Tibet have been forced to withdraw as fears grow of renewed flooding.

Hundreds believed trapped in hydropower tunnels