French authorities believe arson may have played a role in a major power outage that threatened to jeopardize the Cannes Film Festival’s closing celebrations.

French police were investigating a possible arson attack as being the main cause for a power outage which hit the Alpes-Maritimes region in southern France on Saturday, including Cannes which is hosting its world-famous annual film festival.

An arson attack and damage to a transmission tower cut off power in the area, the authorities said. The festival’s closing ceremony on Saturday is scheduled to proceed normally.