Authorities have suggested the cut was likely due to criminal activity, with a fire reported at a power station and a pylon falling onto a high-voltage line.

A second major power outage hit southeastern France early Sunday, this time in the city of Nice, after a suspected arson damaged an electrical facility.

Traffic lights in parts of Cannes and the surrounding city of Antibes stopped working after 10 a.m. local time, leading to traffic jams and confusion in city centers.