• BREAKING NEWS ABC shows live and on-demand -- Download the WATCH ABC app!

Norway attack suspect pleads not guilty to bombing, shooting

This is an undated image obtained from the Twitter page of Anders Behring Breivik, 32, who was arrested Friday July 22, 2011 in connection to the twin attacks on a youth camp and a government building in Oslo, Norway. Breivik is a suspect in both the shootings and the Oslo explosion Friday.

April 16, 2012 12:00:00 AM PDT
The man charged with killing 77 people in Norway last summer admitted to the killings but plead not guilty in court Monday.

Anders Breivik says he was acting in self-defense. He claims the attacks were necessary to stop Muslims from taking over Norway.

"I admit to the acts, but not criminal guilt," he told the court. He also said he does not recognize Norwegian courts because the political parties they receive mandates from support multiculturalism.

Breivik's Oslo bombing killed eight people. He also shot 69 others at a youth camp outside the city.

Breivik's mental health is a key issue during the trial. In an attempt to prove he is not insane, Breivik will call right-wing extremists and radical Islamists to testify during the trial, to show that others also share his view of clashing civilizations.

The Associated Press contributed to this report.