The suspect arrested for twin terror attacks in Norway Friday has been identified as Anders Behring Breivik, according to media reports in the U.K. and Norway.
A man fitting Breivik's description was reportedly seen in the area of the bombing prior to the explosion.
Norwegian television said that Breivik belongs to right-wing circles in Oslo, and a Swedish newspaper has reported the Breivik has posted on right-wing forums in Norway.
Norwegian media has linked Breivik to a Facebook account in which the poster described himself as a Christian conservative.
At least 17 people are known dead in the two attacks. Seven were killed in the central Oslo bombing, which damaged the office of Prime Minister Jens Stoltenberg.
On the island of Utoya, where Stoltenberg's Labour Party runs a youth camp, at least 10 are dead. A witness reported 20 bodies on the island's shoreline.
There were more than 500 campers on the island when a man dressed as a policeman appeared and began firing two hours after the Oslo bombing.
Teens were seen jumping into the water and swimming away from the island to escape the attack. Explosives were found on Utoya after the suspect was arrested and taken into custody.