The interior minister said, on Monday French Police raided the homes of dozens of suspected Islamists militants.
The raided occurred due to beheading of a teacher who had shown his pupils cartoons of the Prophet Mohammed.
But the raids came a day after thousands of people took part in rallies countrywide to honour the slain French history teacher Samuel paty and to defend freedom of expression.
Samuel Paty was beheaded on Friday outside his school in Conflans-Sainte-Honorine, in the northern Paris suburbs by an 18-year-old man.
Darmanin said there were about 80 investigations under way into online hate speech in France and that he was looking into whether or not certain groups from the French Muslim community should be dissolved following accusations of promoting violence and hate.
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He told Europe 1 radio that, “Police operations have taken place and more will take place, concerning tens of individuals.”
Paty showed his pupils cartoons of the Prophet Mohammad in a class on freedom of expression, angering a number of Muslim parents. Muslims believe that any depiction of the Prophet is blasphemous.
However, France was preparing to expel 231 foreigners on a government watch list for suspected extremist religious beliefs. It was not immediately clear if Monday’s operations were connected.
The attacker, who was of Chechen origin and was born in Russia, had been living in the town of Evreux northwest of Paris.