A suspect vehicle filled with canisters of gas was found parked outside a Synagogue in Marseille on Saturday.
Police found the car outside the Bar Yohaye Jewish Community Centre.
Police had recently apprehended three individuals in connection to a planned attack outside the Notre Dame cathedral in Paris, which was to involve a car filled with canisters of explosive gas. However, there seems to be no indication that the two incidents are linked.
The police are searching for the owner of the car.