Canadian moviegoers who dress up as superheroes, wizards and other characters will face tougher security after the Batman shooting in Colorado.

Canadian theatres have bolstered security after a masked man opened fire at a midnight screening of Batman: The Dark Night Rises, killing 12 and wounding dozens in an Aurora, Colorado theatre.

AMC Theatres, an American company with theatres in Canada, said guests in costumes “that make other guests feel uncomfortable” will be turned away at the door. In addition, all masks and fake weapons are prohibited.

AMC says they’re implementing the policy to ensure moviegoers have “as much peace of mind as possible in these circumstances.”

The company says they will bolster security for future Batman screenings.

Cineplex Entertainment also announced increased security for future shows.

The company, which owns 134 theatres across the country, said costumed guests are still welcome in theatres, but all masks are prohibited.

Meanwhile, Hollywood studios Sony, Fox, Disney, Universal and Lionsgate aligned in a rare show of solidarity with Dark Knight Rises’ distributor Warner Bros. to give their weekend box-office reporting a rest.

Warner Bros. Pictures says it has cancelled appearances by the cast and filmmakers of the movie “The Dark Knight Rises” in Mexico and Japan out of respect for the victims and their families. But it did not scale back on ads or promotions.

“Words cannot express the horror that I feel,” star Christian Bale, who plays the caped crusader in the film, said in a statement. “I cannot begin to truly understand the pain and grief of the victims and their loved ones, but my heart goes out to them.”

With wire services

With files from the Associated Press