The man, named Abdeslam Salah, 26, Belgian, is thought to be the man, who rented VW Polo parked outside the Bataclan concert hall, was stopped briefly by police on the French-Belgian border early on Saturday. He is now on the run, and described by police as dangerous.
Seven attackers, including two who lived in Belgium, died during assaults on a series of targets, officials said, BBC reports.
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.”
The discovery of a suspected getaway car in Paris on Sunday fuelled suspicion that at least one suspect had got away.
French police appealed for information about Abdelslam Salah but warned people not to approach him.
Abdeslam Salah is thought to be one of three French brothers living in Belgium who were involved in the attacks.
French media reported that one of the brothers, named as Ibrahim, died in the onslaught.
A third brother – unnamed yet – was arrested in Brussels, where at least seven men have been detained since Saturday for questioning by Belgian police.
The terrorists with fire arms and bombs attacked simultaneously the restaurants, a concert hall and a sports stadium on Friday night in several districts of Paris.
The Paris public prosecutor Francois Molins said 129 people were killed and 352 wounded, of whom 99 remain in a critical condition.
President Francois Hollande on Saturday promised a “merciless” response for the attacks.
Hollande canceled his attendance at the G20 summit after declaring the first nationwide state of emergency since 1945. France will be represented by its foreign and finance ministers.
Announcing three days of national mourning and a national state of emergency, President François Hollande called the coordinated assault – “prepared, organised and planned overseas, with help from inside” – an “act of war” that must be countered “mercilessly”, The Guardian informed.