On the evening of April 14, 2011, a suitcase containing a suspected improvised explosive device was left in the WDIV studio lobby after the person who planted the device was denied entry by the station's security guard, prompting the Detroit Police Bomb Squad to evacuate the studio as well as the Doubletree Hotel across the street. That night's 11 p.m. newscast was broadcast from the corner of Lafayette and Howard streets; the evacuation resulted in master control operations being inaccessible, preventing the broadcast or editing of news stories, and the broadcast of commercials. The station's PSIP virtual channel temporarily reverted to 45.1 (the station's physical digital channel), with HD content downconverted to 720p. The device was detonated minutes later, with police giving the all-clear at 11:15 p.m. for the news crew to re-enter the studio.