About 110 people have been stuck on a series of cable cars high above the glaciers of Mont Blanc in the French Alps, officials say.
A rescue operation is now under way, and reports say dozens of people have already been airlifted by helicopters.
The cable cars were at "an altitude of about 3,800m (12,468ft)", the prefect of the Haute-Savoie region, Georges-Francois Leclerc, told AFP news agency.
The problem was caused by cables that got crossed for "unknown reasons".
