FRANCE-ATTACK-INQUIRY

Picture taken on December 21, 2014, shows the police station in Joue-les-Tours, where French police shot dead a man who attacked them with a knife while shouting "Allahu Akbar" ("God is great" in Arabic). Security was stepped up at police and fire stations across France on December 21, after a knife-wielding French convert to Islam, Bertrand Nzohabonayo, was shot dead after attacking three police officers. The assailant, a French national born in Burundi in 1994, cried "Allahu Akbar" ("God is great") during the assault, added the source close to the probe, which is being carried out by anti-terror investigators from the Paris prosecutor's office. AFP PHOTO / GUILLAUME SOUVANT (Photo credit should read GUILLAUME SOUVANT/AFP via Getty Images)