Active shooter reported at the O.C. School of the Arts in DTSA

UPDATE: A reader has reported that the scene has been cleared by the police. Initially police thought that a large caliber gun was fired near OCSA. However now the school is telling parents that a vehicle had a loud backfire in the area. The O.C. Register also has reported that the backfire was the cause of the panic.Readers are reporting that there is an active shooter at the Orange County School of the Arts, which is located in downtown Santa Ana.Apparently the students have been texting frien