LANCASTER, PA. — Police were called to a central Pennsylvania office building after someone mistakenly thought a photographer’s tripod was a gun.

Lancaster Police reports the incident happened about 11 a.m. Wednesday at the Griest Building in Lancaster.

The caller thought a machine gun was carried into the building, so police conducted a floor-by-floor search only to find the photographer and her tripod.

Employees at Industrial Resolution, a software firm in the building, took a photo of the responding officers and the photographer, who mugged for the camera. The company posted the image on its Facebook page (http://on.fb.me/1OgWBoZ ).

Lancaster police Lt. Todd Umstead says the caller did the right thing that that police would “much rather respond to a call like this” and find nothing than not get a call when someone really has a gun.