ESPARTO — Three brothers, two of them East Bay residents, were among seven people identified Friday by authorities in Yolo County as victims of an explosion at a warehouse storing fireworks. Investigations continue into the explosion’s fire and origin, and officials have not ruled out the possibility that criminal charges could come later.

Investigators released the names on Saturday of the seven people who were killed in a massive pyrotechnics facility explosion in Northern California that took place days before the Fourth of July. The blast occurred in Esparto, about 40 miles from Sacramento, on July 1, triggering a series of massive explosions, according to the fire department.