Bomber was young Frenchman linked to extremists
One of the suicide bombers who targeted Paris was a young Frenchman flagged in the past for links with an Islamic extremist activity.
Two French police officials said the man was among attackers who blew himself up after a rampage and hostage-taking in a Paris concert hall.
Earlier, police officials said at least one of the suicide bombers who targeted another site, France's national stadium, was found to have a Syrian passport.
None of the attackers has been publicly identified.
A Greek official said the attacker whose Syrian passport was found at the scene crossed in to the European Union through the Greek island of Leros in October.
Citizen protection minister Nikos Toskas, in charge of police forces, said in a statement: "On the case of the Syrian passport found at the scene of the terrorist attack.
"We announce that the passport holder had passed from Leros on October 3. where he was identified based on EU rules. We do not know if the passport was checked by other countries through which the holder likely passed.
"We will continue the painstaking and persistent effort to ensure the security of our country and Europe under difficult circumstances, insisting on complete identification of those arriving."