As France observed its second of three days of national mourning, the authorities in both France and Belgium raced to track down suspects and chase leads. At one house in the Rhône department in the southeast, around Lyon, the police found a Kalashnikov assault rifle, three automatic pistols, ammunition and bulletproof vests. Officers then obtained a warrant to search the home of the parents of a man who lived in the house, where they found several automatic pistols, ammunition, police armbands, military clothing and a rocket launcher. Prime Minister Manuel Valls and Interior Minister Bernard Cazeneuve promised to keep up the search.