OSLO - The Norwegian anti-Islam militant Anders Behring Breivik who massacred 77 people in July arrived under heavy armed guard at an Oslo courthouse on Monday, lifting his arm in what he has called a rightist salute as his trial began.

"I do not recognise the Norwegian courts. You have received your mandate from political parties which support multiculturalism", Breivik told the court. "I do not acknowledge the authority of the court."

Breivik, 33, has admitted setting off a car bomb that killed eight people at government headquarters in Oslo, then massacring 69 in a shooting spree at an island summer camp for Labour Party youths.

Anders Behring Breivik raises his fist as he arrives to courtroom for the first day of his trial in Oslo, April 16, 2012. [Photo/Agencies]