The incident took place on Saturday night in Chino, California. According to [1], msn.com reported that eight people, including four children, were injured during a fireworks display around 10:30 PM local time. The article did not specify if the injuries were from the explosion or another cause.
[2] Yahoo.com provided more details on the incident, stating that one woman died and three others were injured, including a child, in a fireworks explosion on July 4th. [3], msn.com, corroborated this information, noting that a woman in her twenties was killed and three others were injured after a fireworks explosion during Fourth of July celebrations.
[4] 6abc.com also reported the incident, stating that one woman died and three others were injured, including a child, after a fireworks explosion occurred during a Fourth of July gathering. [5], kdvr.com, however, covered a different event, reporting on multiple people being stabbed in Denver instead of the Chino incident.