A helicopter crashed and burst into flames Sunday morning amid foggy conditions in the hills above Calabasas, with multiple fatalities reported. The crash occurred shortly before 10 a.m. near Las Virgenes Road, south of Agoura Road, according to a watch commander for the Los Angeles County Sheriff’s Department. The crash ignited a brush fire and made it difficult for firefighters and emergency personnel to get to the aircraft, he said. Sources at the scene said they believed there were multiple fatalities, but the exact number was unclear.