French diplomatic missions remain on alert after a satirical weekly’s decision to publish pictures of the Prophet Muhammad.
This week’s Charlie Hebdo is already a sell-out amid an outcry from France’s Muslim community.
French Foreign Minister Laurent Fabius has said the government supports freedom of expression, but warned that it must be used “responsbly”.
Security has been beefed up at the French embassy in Beruit, Lebanon, ahead of expected violent demonstrations on Friday.
France will close 20 of its embassies worldwide, but officials have refused to specify which countries would be affected.