Paris, France( CNN) The ringleader behind the Paris attacks is dead, killed during a dramatic raid that shook a neighborhood and collapsed an entire floor of an apartment building. But French authorities say their work is far from finished.

Six days after a coordinated string of shootings and bombings killed 129 people in the French capital, at the least one suspect is still on the run. A series of raids in Belgium and a search of a home on the suburbs of Paris Thursday were the most recent signs of investigators' efforts to piece together — and take down — the network of terrorists behind the two attacks before they can ten-strike again.

French officials said the raid Wednesday at an apartment building in the northern Paris suburb of Saint-Denis was a significant step. On Thursday, they confirmed they'd identified the body of Abdelhamid Abaaoud, the ringleader of the Paris attacks, may be in the rubble of the apartment.