The bomb explosion was near the office of Prime Minister Jens Stoltenberg at 15:26. It killed eight people and injured several others. The second attack happened about 90 minutes later, at a youth camp organized by the youth group (AUF) of the Norwegian Labour Party (AP) at the island of Utøya in Tyrifjorden, Buskerud. A gunman disguised as a policeman opened fire at the campers, killing 69 people.