Police in France are hunting for any accomplices of the gunmen who killed 17 people in two days of terror attacks, reports the BBC.
One key figure is Hayat Boumeddiene, the partner of Amedy Coulibaly. He was killed when police stormed a kosher supermarket in Paris.
She was said to be with Coulibaly when a policewoman was killed and is described as "armed and dangerous".
Two gunmen who carried out Wednesday's deadly attack on Charlie Hebdo magazine were killed by police.
President Francois Hollande praised the police but also warned of further threats.
He thanked the security services for their "bravery and efficiency", saying the week's violence was "a tragedy for the nation".
Mr Hollande said the danger was not over yet. "We have to be vigilant. I also ask you to be united - it's our best weapon," he said in a televised address on Friday night.
After a security cabinet meeting on Saturday interior minister Bernard Cazeneuve said France would remain on its highest state of alert "for the next few weeks".
Tight security would be in place for a unity march in Paris on Sunday, which will be attended by British and German as well as French leaders, added Mr Cazeneuve.