French Interior Minister Bernard Cazeneuve says three mosques have been shut down in France since the Paris attacks as part of a crackdown on extremist activities.
Cazeneuve told reporters it was the first time mosques are being closed in France "on grounds of radicalization."
One of the mosques, 35 kilometers (22 miles) east of Paris in Lagny-sur-Marne, was targeted by raids early Wednesday, with police seizing a 9mm revolver, a computer hard disc and jihadist propaganda. Cazeneuve said the mosque also had a non-authorized Quranic school.
One person was placed in custody following the raids, with 22 others banned from leaving France. Nine others were put under house arrest.
The two other mosques, in Lyon and Gennevilliers in the Paris region, were shut down last week amid a state of emergency.
Cazeneuve says police have seized 334 weapons since the Nov. 13 attacks that left 130 people dead in Paris.
The directors of the Bataclan concert hall in Paris, where two-thirds of the 130 victims of the Paris attacks were killed, have said it will reopen before the end of 2016.
Jules Frutos - who has run the venue with Olivier Poubelle since 2004 - told Le Monde in an interview published Wednesday that "it's necessary to see the doors open again."
Poubelle said that "it shouldn't be turned into a mausoleum. Or a pilgrimage site."
World leaders, including Barack Obama, have been visiting the site this week, each bringing a white rose to honor those who died in the Nov. 13 attacks.