French President Francois Hollande on Thursday declared the security of French Jews to be a "national cause" and pledged "unrelenting combat" against anti-Semitism, including on social networks, reported dpa.
Hollande made the remarks in the presence of Israeli Prime Minister Benjamin Netanyahu, during a ceremony in the city of Toulouse to commemorate three Jewish children and a rabbi shot dead by an Islamist gunman in March.
"French Jews must know that the republic will do everything to protect them," he said.
Hollande also promised full transparency on what he called intelligence "deficiencies" in the case of Mohamed Merah, who shot dead seven people in total before being killed by police in a raid.