According to one attendant's tweet, "If you pray pls do so now for Twi fan G! She was just hit by a car in front of the convention center! She was unconscious when taken hosp."
Vale from Twilight Poison, who is in the area, has informed me that the fan in question was crossing the street next to Hall H when she was struck by a vehicle. "From the moment she was hit to when the ambulance arrived and took her, she was completely unconscious. I don't know if it's super serious but it might be if she was knocked off her feet and left unconscious! ... Everybody is pretty shaken up about it," she explained.
Let's hope her injuries are not serious, poor thing!
UPDATE: Sadly, it has now been reported that "G" now been pronounced dead as a result of the incident, due a head injury. According to her friend who reported the accident on Twitter, "Im sorry to tell everyone G passed away." What a sad day for us all.
UPDATE 2: A San Diego report now indicates that the incident took place at Fifth and Harbor, and police received a call at 9:20 a.m. PST. When ambulances arrived, they found the victim with head trauma and bleeding and she died at the hospital. Reports the source, "The driver of the car that struck the pedestrian stayed on the scene."
UPDATE 3: I've now learned that the victim's name was Gisela G. and that her Twitter handle was @Mad4Hugh. A photo of her with friends camping for the event can be seen here (the woman in the green shirt). The area is now being blocked off by police, as can be seen in this picture. She was reportedly 53 years old, and the driver was a 67-year-old male.
UPDATE 4: Some fans are now petitioning for a moment of silence during the Breaking Dawn - Part 2 panel in honor of Gisella. You can sign it here. Other fans have now organized a fundraiser for funeral expenses for the victim's family.
UPDATE 5: According to a fan on the scene, "Security decided we had to move once again and told us it would be an hour before we would do so. She went with friends across the street thinking there would be plenty of time before they had to return. Security then came back and told everyone they had decided to move us in 20 minutes. They were rushing back to the line to gather their things to move. I received info from someone who went with her to the hospital that they were rushing across the street, the car turned in front of her, she made eye contact with the driver, she tried to stop to avoid the car, stumbled and fell hitting her head on the pavement."