At least 12 people are reported to have been killed in the incident, and a further 38 injured.
"Warner Bros is deeply saddened to learn about this shocking incident," the studio stated. "We extend our sincere sympathies to the families and loved ones of the victims at this tragic time."
US President Barack Obama released a statement earlier today, describing himself as "shocked and saddened" by the events.
The Hollywood Reporter reports that the film's Paris press interviews and red carpet premiere, which were scheduled for this afternoon and this evening respectively, have been cancelled by Warner Bros.
Director Christopher Nolan and stars Christian Bale, Anne Hathaway and Morgan Freeman are reportedly in Paris to promote the film, but journalists were asked to leave upon arriving for the scheduled press event.