NDTVArmed man holds hostage in Pittsburgh, while posting on FacebookChicago TribunePITTSBURGH (Reuters) - An armed man claiming to have a bomb was holding a hostage inside a Pittsburgh high-rise building on Friday, authorities said, and he appeared to be posting messages about his situation on Facebook. Police were negotiating with ...Armed man takes hostage, talks with friends on FacebookUSA TODAYPittsburgh cops: Hostage situation in office towerCBS NewsMan holds hostage in Pittsburgh, posts to FacebookBoston.comYouTubeall 715 news articles »