Seven attackers, including two who lived in Belgium, died during assaults on a series of targets, officials said.
French Interior Minister Bernard Cazeneuve said the attacks had been prepared "by a group of individuals based in Belgium" who had "benefited from accomplices in France."
On Sunday, the discovery of a suspected getaway car in Montreuil, east of Paris, fuelled suspicion that at least one suspect had escaped.
French police appealed for information about Abdelslam Salah but warned people not to approach him.
France is marking three days of national mourning for the 132 people who were killed in attacks on restaurants, a concert hall and a sports stadium.
Hundreds of others were injured, many critically.
Rented in Belgium
The Seat car found in Montreuil is believed to have been used by gunmen who opened fire on people in restaurants on Friday, police say.
Several AK47 rifles were found in the car, French media quote judicial sources as saying.
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