"We are looking into the likelihood of a fire being started deliberately," said a spokesperson for the French national gendarmerie, adding that no arrests had been made at this stage.

France boosts security after suspected sabotage at a Nice power substation caused a second major Riviera blackout in two days, cutting electricity to 45,000 homes and briefly hitting the airport. A

AN “ultra-left anarchist gang” has claimed responsibility for a blackout that plunged 160,000 homes into darkness on the Côte d’Azur – just hours before the Cannes Film Festival awards show.

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An electrical transformer was set on fire in what appears to be an act of vandalism. Some 45,000 homes were temporarily without power in Nice and some neighboring towns. Power was restored by early Sunday morning.

Local authorities in France's Alpes-Maritimes region on Saturday reported a major electricity outage in parts of the region, including Cannes city, which is hosting its annual film festival. RTE, the electricity transmission system operator of France,