French counterterrorism investigators questioned five people on Tuesday after police over the weekend found what appeared to be a ready-to-detonate bomb at an apartment building in one of Paris's poshest neighborhoods.
Interior Minister Gerard Collomb said one of those arrested was on an intelligence services list of "radicalized" persons — a list that includes the names of potential Islamist militants.
"We are still in a state of war," Collomb, speaking after a Sunday attack in which a man stabbled and killed two women outside the train station in Marseille, told France Inter radio.