SIMI VALLEY, Calif. (AP) — More than two dozen people were injured Thursday when fireworks malfunctioned at an annual 4th of July show northwest of Los Angeles. An accidental detonation occurred about 9:20 p.m. at an event called the Fireworks Extravaganza located in a large community park in Simi Valley. Police Cmdr. John Parks said it wasn't clear how many people were in attendance but said the event usually attracts several thousand revelers. Twenty people were taken to area hospitals with minor to moderate injuries. Another eight were treated at the park where emergency crews set up a triage area. A bomb squad was at the park to deactivate the remainder of the fireworks. A video clip show on KCAL-TV shows a pair of firework blasts at or near the ground.