A police source said the group of teens were arrested in the parking lot of a highschool in the port town of Agde, as several other complaints poured in over "armed clowns" in the region over the weekend.
In the Mediterranean city of Montpellier a man disguised as a clown was arrested after beating up a pedestrian with an iron bar, while three motorists in different towns complained about "scary clowns" threatening them.
In the northern French town of Bethune, a fake clown last week received a six-month suspended jail term Monday for threatening passers-by while in full circus garb.
Using fake weapons these "clowns" have been "mostly spotted outside schools, but also on public roads, in bushes, in a square. Their targets are often young children or teenagers, but also adults," a police source in northern France told AFP.
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These include a challenge launched on social networks, a video published on YouTube showing a terrifying clown pranking people -- which has had some 31 million views -- or even a recent episode of popular series American Horror Story featuring Twisty the killer clown.
After a rumour a clown was stalking the eastern town of Mulhouse, five teenagers on Wednesday armed themselves with a baseball bat, a teargas canister, a hammer and a truncheon to mete out vigilante justice to the not-so-funny pranksters.
"Since mid-October, a rumour inspired by videos published on the internet, is worrying the population about the presence of threatening and aggressive clowns in France," the national police said in a statement this week.