OSLO - A gunman shot dead at least 80 youths at a summer camp of the ruling Labour Party on Friday, police said.
"The updated knowledge we are sitting on now is at least 80," police chief Oystein Maeland told a news conference. "We can't guarantee that won’t increase somewhat," he said, adding some were badly injured.
Previously, police had said that at least 10 had been killed in the shooting at the Utoeya island northwest of Oslo, along with seven killed by a bomb blast in central Oslo.
Maeland said the attack had reached "catastrophic dimensions".