French President pledged to fight extremism and anti-Semitism "with the greatest firmness."

PARIS (AP) -- France is boosting security at Jewish religious sites after blank bullets were fired on a synagogue west of Paris.

French President Francois Hollande met Sunday with leaders of the country's Jewish community amid renewed concerns about anti-Semitism, and pledged to fight extremism and anti-Semitism "with the greatest firmness."

He says authorities "in the coming days, in the coming hours" will increase security at Jewish religious sites so they won't be subject to the kind of attack that targeted a synagogue in the Paris suburb of Argenteuil on Saturday night.

A representative of the synagogue says the building was targeted with about eight blank bullets and services were canceled. The representative, who spoke on condition of anonymity because a police investigation is under way, said no one was hurt in the incident.