At 15:25 on July 22, 2011, a terrorist detonated a fertilizer bomb located a few meters from the entrance of Høyblokka in Grubegata in Oslo, the focal point of the Norwegian Government Quarters. The explosion killed 8 people, and left the entire area in ruins. The following year, the Norwegian Directorate of Public Construction and Property (
Statsbygg) were tasked with developing new government quarters in the same location at Hammersborg.