The raid in the town of Verviers comes the same day police arrested a man accused of selling weapons to Amedy Coulibaly, who was killed by police after he attacked a Paris kosher shop last week.
Francis said there are limits to freedom of speech, especially when it concerns religion. He was answering a question about the deadly attack last week on the French satirical magazine Charlie Hebdo.
A section of Paris, which is known for its picturesque parks and artistic community, was also home to the gunmen in last week's terror attack. Renee Montagne talks to Myriam Benraad, a French scholar.
Jewish and Muslim communities have lived together for decades in Sarcelles, about 10 miles from Paris. But locals say last week's attacks in Paris have heightened awareness of religious differences.
After two separate police standoffs that lasted for hours, three suspects in recent attacks in Paris are dead. Four hostages also were killed, President François Hollande said Friday.
A new concert hall known as the Philharmonie de Paris opened in the 19th arrondissement on Wednesday. French President Francois Hollande attended the opening night concert.
In Muslim communities around France, some don't believe the official version of events. In schools, some Muslim students refused to join in a moment of silence for the victims of the attacks.
Dieudonne's alleged crime: writing "Je suis Charlie Coulibaly" (I am Charlie Coulibaly). He was one of 54 people held across the country; none has been linked to the deadly attacks.