Police said the investigation is still open and they are trying to determine an exact motive and whether he was working with anyone.
"This is beyond comprehension. It's a nightmare. It's a nightmare for those who have been killed, for their mothers and fathers, family and friends," Prime Minister Jens Stoltenberg told reporters early today.
Just hours before the shooting at a summer youth camp run by Norway's ruling party on the island of Utoya, explosions ripped through a government building in the capital city of Oslo and left at least seven people dead.
The suspect had been seen in Oslo earlier in the day, according to media reports.
Youth Camp Shooting
After blasts rocked Oslo, the shore of a once idyllic lake at Utoya became a horrific triage area.
"The guy was dressed as a policeman and he was trying to ensure that he was helping us and he said, 'come here,'" said witness Jorgen Benone. "He had a rifle or a sniper which he was using to shoot at us. It was total chaos."
Many tried to swim to safety but the gunman armed with several weapons was able to shoot them as they swam.
Bodies after bodies were pulled from the lake.
The boats and helicopters couldn't move the dead and injured fast enough."People were jumping out of windows and running everywhere in all directions - terrified for their lives," said Benone. "Most people ran towards the water hiding behind stones and small hills."