Images: Pittsburgh standoff

Posted: 11:51 AM EDT Sep 21, 2012   Updated: 1:37 PM EDT Sep 21, 2012

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

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Gene J. Puskar, AP

Police block off the area around Three Gateway Center, building left rear, where they are negotiating with a man who claims to have a bomb, in downtown Pittsburgh on Friday, Sept. 21, 2012. A call about an armed man inside the building prompted an evacuation amid reports of a hostage situation.