An "imminent" terror attack on French soil has been averted with the arrest of four suspects in Montpellier, interior minister Bruno Le Roux said, reports the BBC.
Three men and a girl of 16 were found with bomb-making materials by anti-terrorist police in a raid on a flat in the southern city.
Home-made explosives similar to those used in the Paris attacks of November 2015 were discovered.
Reports suggest the girl had made jihadist declarations online.
Since the beginning of 2015, at least 230 people have been killed in jihadist attacks in France.
Last week, a soldier received minor injuries when a machete-wielding man tried to enter the Louvre museum in Paris.
The man, a 29-year-old Egyptian named as Abdullah Hamamy, was shot and critically injured.
Photos from the scene in Montpellier show debris outside the door of the flat that police stormed on Friday morning.
Early reports suggested that one of the Montpellier detainees was a would-be suicide attacker.