At least 80 people died when a gunman opened fire at an island youth camp in Norway, hours after a bomb attack on the capital, Oslo, police say.
Oslo police are questioning a 32-year-old Norwegian man in connection with both attacks.
The man was arrested on tiny Utoeya island outside Oslo, where police say he opened fire on teenagers.
The earlier bomb attack killed at least seven people. The attacks are the worst Norway has seen since World War II.
Prime Minister Jens Stoltenberg, whose Oslo offices were among those badly hit by the blast, described the attacks as "bloody and cowardly".
Hundreds of young people were attending the summer camp organised by the ruling Labour Party on Utoeya island.
Eyewitnesses described how a man dressed as a policeman opened fire indiscriminately. People said that after the gunman started shooting, campers jumped into the water to try to escape the hail of bullets.
Police say they discovered many more victims after searching the area around the island.
"It goes without saying that this gives dimensions to this incident that are exceptional," police director Oystein Maeland is quoted as saying by the Associated Press news agency.
Police say many others are injured, and warned the number of dead may rise further as rescue teams continued to scour the waters around the island. Some of the teenagers were shot at as they tried to swim to safety.
Earlier, the number of dead from the Utoeya shooting spree, which is among the world's most deadly, was put at 10.
Oslo police are questioning a 32-year-old Norwegian man in connection with both attacks.
The man was arrested on tiny Utoeya island outside Oslo, where police say he opened fire on teenagers.
The earlier bomb attack killed at least seven people. The attacks are the worst Norway has seen since World War II.
Prime Minister Jens Stoltenberg, whose Oslo offices were among those badly hit by the blast, described the attacks as "bloody and cowardly".
Hundreds of young people were attending the summer camp organised by the ruling Labour Party on Utoeya island.
Eyewitnesses described how a man dressed as a policeman opened fire indiscriminately. People said that after the gunman started shooting, campers jumped into the water to try to escape the hail of bullets.
Police say they discovered many more victims after searching the area around the island.
"It goes without saying that this gives dimensions to this incident that are exceptional," police director Oystein Maeland is quoted as saying by the Associated Press news agency.
Police say many others are injured, and warned the number of dead may rise further as rescue teams continued to scour the waters around the island. Some of the teenagers were shot at as they tried to swim to safety.
Earlier, the number of dead from the Utoeya shooting spree, which is among the world's most deadly, was put at 10.
