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.

"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.

CANNES, France - 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.

City suffers blackout, affecting internet access, mobile networks, train lines and credit card machines, but closing ceremony goes ahead