One of the seven suspected Paris attackers has been identified by investigators as a 29-year-old Frenchman.
Ismael Omar Mostefai, from the Chartres region of France, was apparently known to security services after being flagged for links to Islamic radicalism.
Police have also arrested his father and brother and four other family members as part of their investigation.
Paris prosecutor Francois Molins said Mostefai had a criminal record and was known to security services but had not spent any time in jail, according to newspaper Le Figaro.
It has also been reported that Mostefai was identified by a fingerprint from a severed finger at scene of one of the attacks.
Two other attackers were French nationals living in Brussels, Belgian's Federal magistrate has confirmed.
At least 129 people were killed and hundreds injured on Friday in France's worst ever terrorist attack - an atrocity which President Francois Holland called an "act of war".