Idaho movie house operators, members of the National Association of Theatre Owners, are reviewing security procedures in the wake of Friday's early morning massacre at a Colorado cineplex.
NATO said in a statement on Friday that its members are now "working closely with local law enforcement agencies and reviewing security procedures."
The Dark Knight Rises is currently showing on more than 4,400 of the nation's movie screens, including cineplexes across the Treasure Valley.
"On behalf of all the members and staff of the National Association of Theatre Owners, our hearts and prayers go out to the victims of this despicable act and their families. We are grateful for the quick and effective response by police and emergency personnel," the group said.
A number of theater owners quickly crafted a policy Friday, forbidding moviegoers to show up at cineplexes in costume, at least until further notice. Law enforcement agencies were particularly concerned about costumed fans who may be carrying toy weapons.
The AMC theater chain, the nation's second largest with more than 5,000 theaters across the country, said all of its theaters are reviewing security procedures.
"We are terribly saddened by the random act of violence in Aurora and our thoughts are with the victims and their families. For the safety and security of our guests and associates, we are actively working with local law enforcement in communities throughout the nation, and under the circumstances, we are reaching out to all of our theaters to review our safety and security procedures," a rep said in a statement. "Being a safe place in the community for all our guests is a top priority at AMC, and we take that responsibility very seriously."
A gunman in a gas mask and bullet-proof vest, identified by authorities as James Holmes, allegedly killed 12 people at a midnight premiere of the new Batman movie on Friday in Aurora, Colo., after hurling a gas canister into the theater and opening fire on moviegoers. Reuters reports that a total of 71 people were shot during the attack.