A 53-year-old "Twilight" fan who was camping outside the San Diego Convention Center in anticipation of Thursday's Hall H panel died this morning after being struck by a car.

According to U-T San Diego, police say the woman was running across Harbor Street at about 9:20 a.m. when she tried to stop to avoid an oncoming Subaru but instead tripped into the car. She was unconscious and bleeding from her head when she was transported to a hospital, where she was pronounced dead.

The woman's name is being withheld until her family can be notified.

Examiner.com points to a photo on what's believed to be the woman's Twitter account, showing her with friends at the front of the line for the final "Twilight" panel. Fans of Stephenie Meyer's bestselling novels, and the blockbuster movie franchise they spawned, have become a significant presence at Comic-Con International over the past few years, where many of them camp outside the convention center for days in advance in a tent-and-sleeping-bag city dubbed "Camp Twilight."

"The Twilight Saga: Breaking Dawn -- Part 2" panel will be held Thursday at 10 a.m.