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"Gangster Squad" release date pushed back to 2013

Sean Penn in a scene from "Gangster Squad." Warner Bros.

(CBS News) Warner Brothers has officially pushed the release date for "Gangster Squad" from Sept. 7 to Jan. 11.

The change, according to Variety, gives the studio more time to reshoot a scene where gunmen open fire through a movie screen into a crowded theater, in light of the July 20 mass shooting during a midnight screening of "The Dark Knight Rises" in Aurora, Colo.

Read More: "Gangster Squad" may change after Colorado shooting

The movie theater scene has been described as a pivotal part of the film, which is about the Los Angeles Police Department's fight to keep the mafia out of the city in the 1940s and '50s.

The movie studio initially pulled the film's trailer, which prominently features the scene, from theaters after the shooting. The studio has now also cancelled upcoming press screenings in addition to moving back the release date.

"Gangster Squad" features stars Sean Penn, Ryan Gosling, Josh Brolin and Emma Stone.

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