Around 3pm this friday, the emergency services of Boulogne and Issy-les-Moulineaux barracks are asked for a fire in a house due to an explosion. On the scene, this is confirmed, a 3-floors building is partially collapsed. The sappers get organize quickly. Reinforcements are asked for, while hoses are put up in order to fight the flames which are ravaging two levels. The commandment aims are clear: to secure the site, to fight against the propagations and, above all, to extract the victims of the disaster. The specialists of “research and rescue in urban zone” and the cynotechnical teams worked together with the hundred other sappers. After more than three hours of intervention, the result is of two absolute urgencies and three minor injuries.