Weekend box office for "The Dark Knight Rises" is projected to be adversely affected by the Colorado movie theater massacre that left 12 dead and 58 injured Friday morning.

Ticket sales for "Dark Knight" were brisk on Friday, adjusted to $76.1 million, but off Saturday and Sunday, according to Deadline.com

There was a  41 percent drop in sales Saturday, mostly due to the $30.6 million in midnight show sales from the previous day, and is projected to be at $39.3 million Sunday, a drop of 12 percent, according to Deadline.

Still, "The Dark Knight Rises" is poised to have the largest-grossing weekend opening of a 2D film in North America, according to the site.