On 22 July 2011, Anders Behring Breivik killed 69 people on the small island of Utøya, 40 kilometers northwest of Oslo, in Norway.
The Utøya incident took place less than two hours later. The island is the site of an annual summer camp organized by the youth division of the Norwegian Labor Party.
Breivik gained access by posing as a police officer who had come to conduct a routine check following the Oslo bombing.
He went on to shoot indiscriminately, killing and injuring people around the island and firing on those who jumped into the water in an attempt to escape.
Local police did not have a helicopter appropriate for transporting groups of officers, and could not find a suitable boat to reach the island.
Marius Hoft was the last surviver on the island. He hides in a clifftop crevice while Anders Breivik goes on a shooting spree in the woods above him.
When anti-terror police arrived from Oslo, they were eventually carried over to Utøya on civilian craft, reaching the island an hour after the first shots had been fired.
Breivik was arrested, and later put on terrorist charges for both attacks.
Breivik, who admitted carrying out both the bombing and the shooting, had been preparing for the attacks for a number of years, and had distributed a manifesto outlining his extremist beliefs.