A suspected car bomb was discovered during the Sabbath outside a synagogue in the southern French city of Marseille on Saturday.
Two gas cylinders were found in a car parked outside the Bar Yohaye synagogue in the fourth district, according to numerous posts on social media.
Dozens of worshipers were praying the shacharit morning service when the car was spotted, at approximately 11 am.
Bomb squad sappers were immediately called to the site.
But Bouches-du-Rhône region Police Commissioner Laurent Nuñez told media no trigger mechanism was found, and the car was not stolen.
French police have been on high alert since an ISIS-inspired attempt a week ago, however, to blow up the Notre Dame Cathedral in Paris.
Authorities said seven gas canisters were found inside an abandoned Peugeot vehicle with no license plate outside the Paris cathedral. Forensics experts tracked down suspects via DNA found at the site.
Three women have since been arrested in connection with the attempted terror attack a week ago in Paris.