Warner Bros. canceled the Paris premiere of the film, scheduled for this evening, after learning about the shooting. Director Nolan and cast members Christian Bale, Anne Hathaway and Morgan Freeman also scrapped media interviews.
"Warner Bros. and the filmmakers are deeply saddened to learn about this shocking incident," the studio said in a statement. "We extend our sincere sympathies to the families and loved ones of the victims at this tragic time."
Warner Bros. also removed the trailer for the Ryan Gosling film "Gangster Squad," which features a movie theater shooting scene, from screenings of "The Dark Knight Rises." The studio pulled some TV ads for the Batman film, according to Bloomberg News. The studio does not plan to pull the movie from theaters.
Many cities are stepping up security at theaters in light of the tragedy. New York City police Commissioner Ray Kelly released a statement this morning, saying, "As a precaution against copycats and to raise the comfort levels among movie patrons in the wake of the horrendous shooting in Colorado, the New York City Police Department is providing coverage at theaters where the 'The Dark Knight Rises' is playing in the five boroughs."
Police in Washington, D.C., have been told to provide "special attention" to movie theaters.
For continuing coverage on Tragedy in Colorado: The Batman Massacre, tune in to "World News," "20/20" and "Nightline."