The weapons used by a terror cell in attacks in Paris that left 17 people dead came from outside France, and authorities are urgently tracing the source of the financing, police officials say.
Several people are being sought in relation to the "substantial" financing of the three gunmen, as well as others in their network, according to police union representative Christophe Crepin.
He said the weapons stockpile clearly came from abroad and the amount spent shows an organised network.
The militants behind the attacks claimed allegiance to al Qaida and the Islamic State extremist group, but Mr Crepin said the people in the Paris cell had mixed allegiances, with little loyalty to individual jihadi groups.
Police say as many as six members of the terrorist cell that carried out the Paris attacks could still be at large, including a man seen driving a car registered to the widow of one of the gunmen.
Said and Cherif Kouachi opened the onslaught in Paris with an attack on the Charlie Hebdo newspaper, singling out its editor and his police bodyguard for the first shots before killing 12 people in all.
The Kouachi brothers and their friend, Amedy Coulibaly, the man who killed four hostages in a kosher supermarket, died on Friday in clashes with police.
All three claimed ties to Islamic extremists in the Middle East - the Kouachis to al Qaida in Yemen and Coulibaly to the Islamic State group.
Police officials said authorities are scouring Paris for a Mini Cooper registered to Hayat Boumeddiene, Coulibaly's widow, who Turkish officials say is now in Syria.
One official said the Paris terror cell consisted of about 10 members and that "five or six could still be at large", but he did not provide their names. Another official said the cell was made up of about eight people and included Boumeddiene.
Video has emerged of Coulibaly explaining how the attacks in Paris would unfold. Police want to find the person or persons who shot and posted the video, which was edited after Friday's attacks.
Ties among the three attackers date back to at least 2005 when Coulibaly and Cherif Kouachi were jailed together.
Prime Minister Manuel Valls later called for tighter surveillance and other anti-terrorism measures as part of a "war" against radical Islam.
In an impassioned speech, Mr Valls said "serious and very high risks remain" and warned the French not to let down their guard.
He said he wanted new surveillance of imprisoned radicals, and told the interior minister to come up with new security proposals in the coming days.
A man was sentenced to four years in prison yesterday for defending last week's attacks, in a sign that France could be already beefing up actions against extremism.
Mr Valls also vigorously denounced anti-Semitism and urged French Jews to stay in France.