Images: Pittsburgh standoff

Published: Sep 21 2012 11:51:17 AM EDT   Updated On: Sep 21 2012 01:37:03 PM EDT

Police work to resolve an armed hostage situation on the 16th floor of a building in downtown Pittsburgh.

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Keith Srakocic, AP

People evacuated by Pittsburgh police from the Gateway Three office building wait outside as the police negotiate with a man who claims to have a bomb in a suite in the sixteenth floor, in downtown Pittsburgh on Friday, Sept. 21, 2012. A call about an armed man inside the building prompted the evacuation amid reports of a hostage situation.