After President Francois Hollande warned the threats facing France "weren't over" and Islamist groups issued chilling warnings of fresh attacks, authorities pursued Hayat Boumeddiene, said to be "armed and dangerous."
She is the partner of Amedy Coulibaly, who died yesterday when security forces stormed a Jewish supermarket in eastern Paris where he had taken terrified shoppers hostage.
He killed four hostages during the siege and called friends from the scene urging them to stage further attacks.
As France's bloodiest week in decades drew to a close, the mood began to turn to one of grim national reflection.
President Francois Hollande said he would attend a march of unity in Paris on Sunday expected to draw hundreds of thousands of people as well as the leaders of countries including Germany, Britain, Italy and Spain.
Questions were also mounting over how the three men -- brothers Cherif and Said Kouachi, and supermarket gunman Coulibaly -- had slipped through the security net after it emerged that all three were known to the intelligence agencies.
Hollande, meanwhile, described the attack on the supermarket as an "appalling anti-Semitic act" and said: "These fanatics have nothing to do with the Muslim religion."
The Kouachi brothers were cornered in a printing business in Dammartin-en-Goele outside Paris yesterday after a firefight with police that Paris prosecutor Francois Molins said left Said with a minor neck wound.
The brothers took the manager hostage, later releasing him after he helped Said with his wound, while a second man hid beneath a sink upstairs, said Molins.
The gunmen had a hefty cache of arms including Molotov cocktails and a loaded rocket-launcher.
