French authorities believe arson may have played a role in a power outage Saturday in southeast France that threatened to jeopardize the Cannes Film Festival’s closing celebrations, including the much-anticipated Palme d’Or ceremony.

Axar.az reports, citing AP, power was restored hours before the ceremony, around 3 p.m. local time, as music began blasting again from beachfront speakers. The end of the blackout was greeted with loud cheers from locals.

Authorities were investigating the likelihood of arson in a fire at an electrical substation near Cannes that weakened the grid overnight, a spokesperson for the French national gendarmerie said.

The power outage happened hours later, after a high-voltage line fell at another location. Authorities were investigating what caused that line to collapse.

About 160,000 households in the Alpes-Maritimes area lost electricity.

In a statement, Laurent Hottiaux, the prefect for the area, condemned “serious acts of damage to electrical infrastructures.”

“All resources are mobilized to identify, track down, arrest and bring to justice the perpetrators of these acts,” said Hottiaux.