Several related attacks Attack followed in the Île-de-France region on 7–9 January 2015 , including the Hypercacher kosher supermarket siege where a terrorist held 19 hostages , of whom he murdered Killing 4 Jews .

France raised Cause_change_of_position_on_a_scale its Vigipirate terror alert and deployed Arranging soldiers in Île-de-France and Picardy .