 The gunmen undertook extensive means to delay a police response while the Nokas depot was attacked.The Stavanger Police HQ was blocked by a burning truck on the vehicle exit, smoke grenades were thrown at the front of the building and spike strips were spread across the road to burst the tires of police vehicles.The raiders planned to gain access through a window overlooking a courtyard at the centre of the office block, believing it would not be adequately protected as it was an old building.