According to French media, at least 18 places of worship could be closed. Of the 76 mosques under investigation, 16 are located in the Paris region.
Authorities previously closed a mosque near Paris for six months, following the beheading of a teacher who showed a cartoon of the Muslim prophet Mohammed during a lesson on freedom of expression. A few days before the gruesome murder, the mosque had distributed a video directed against this teacher via a Muslim extremist.