PARIS (AFP) - Two suspects were in custody on Wednesday (Sept 7) after French police found several gas cylinders in a car near Notre Dame cathedral in Paris, sources close to the investigation said.
Anti-terror prosecutors have opened a preliminary investigation, the sources said, adding that no detonators were found in the car.
The car's owner and an associate, both known to police, were arrested on Tuesday, they said.
Notre Dame is one of Paris's most visited landmarks, attracting 13 million visitors each year.
France has been rocked by a string of deadly attacks claimed by the Islamic State in Iraq and Syria (ISIS). In July, 86 people were killed when a truck ploughed into a Bastille Day crowd in the southern resort of Nice, with ISIS saying the truck was driven by one of its followers.
Less than two weeks later, two young militants murdered a priest near the northern city of Rouen.
ISIS also claimed responsibility for the November 2015 attacks on Paris that killed 130 people and injured hundreds.