Fransk politi tror så mange som seks medlemmer av en terrorcelle fremdeles kan være på frifot i Paris.
10.000 soldater er satt inn for å sørge for sikkerheten, 5.000 av dem rundt 700 jødiske skoler og institusjoner.
As many as six members of a terrorist cell involved in the Paris attacks may still be at large, including a man who was seen driving a car registered to the widow of one of the slain gunmen, police officials said Monday.
Two French police officials told The Associated Press that authorities were searching the Paris area for the Mini Cooper registered to Hayat Boumeddiene, the widow of Amedy Coulibaly. She is now in Syria, according to Turkish officials.
The French police officials spoke on condition of anonymity because they are not authorized to discuss details of the investigation with the news media.
Da Cherif Kouachi var i Jemen, bodde han en periode sammen med mannen som forsøkte å sprenge et fly over Detroit med en bombe gjemt i underbuksene. Men han hadde gått så lenge med bomben i underbuksene at tennsatsene ikke fungerte pga skitt.
The journalist said that Kouachi said that he had lived with Umar Farouk Abdulmutallab, convicted of trying to blow up a Detroit-bound airliner.