'Person of Interest' -- TV Show SHUT DOWN For Phony Gun Battle


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NYPD dropped the hammer on the CBS drama "Person of Interest" today -- shutting down filming of the show after locals called cops thinking a scripted gun battle was the real deal ... TMZ has learned.

According to witnesses ... some NYC residents saw people with guns near 47th Street and 5th Avenue today, and believed they were about to get caught in a shootout.


We're told officers (real ones) responded ... and discovered the action was all part of the TV crime drama -- and the firearms were just props, but producers were still guilty of a major no-no.


All gun scenes are supposed to be filmed with NYPD supervisors on the set -- and since this wasn't, cops shut down the production.


The Mayor's Office confirmed the show's permit was revoked -- which forced producers to immediately stop shooting for the day.


091813_person_of_interest_launch Sources connected to the production company tell us the whole mess was merely a "scheduling error" -- they started shooting earlier than planned ... before NYPD monitors arrived.


We're told filming will resume again ASAP.