At approximately 0019, LAFD and LAPD responded to reports of an auto vs pedestrian crash at Plummer & Sepulveda. Arriving units found a female victim underneath a white car, about 150 feet from the crosswalk. The vehicle that hit the woman fled the scene. Firefighters pulled the victim out from underneath the car. She was pronounced dead at the scene. A good Samaritan attempted to chase after the driver but lost the vehicle when it got on the 405 freeway. The vehicle is described as a black BMW,, with tinted windows, which should have moderate front end damage. The witnesses stated the vehicle was traveling a high rate of speed, possibly 80 MPH. No suspect license plate was available. LAPD has Sepulveda Blvd shut down southbound between Plummer and Tupper Street. LAPD Valley Traffic is handling the investigation.