Police initially said about 10 were killed at the forested camp on the island of Utoya, but some survivors said they thought the toll was much higher. Police director Oystein Maeland told reporters early Saturday they had discovered many more victims.
"It's taken time to search the area. What we know now is that we can say that there are at least 80 killed at Utoya," Maeland said. "It goes without saying that this gives dimensions to this incident that are exceptional."
Image: Smoke rises from the central area of Oslo on July 22, 2011 after an explosion at the prime minister's office.