Authorities say five people have been charged with murder in a deadly Northern California explosion at a fireworks warehouse that killed seven people. Yolo County Deputy District Attorney Clara Nabity said Friday the charges stem from a grand jury indictment that found five people, including a former Yolo County Sheriff lieutenant, responsible for the explosion. The deadly fireworks explosion near the small farming community of Esparto in Yolo County sparked a massive fire and led to nearby Fourth of July celebrations being called off.