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.