Norwegian police are looking for an "insane and dangerous" man, who has compared himself with Anders Behring Breivik, the principal suspect in the twin terror attacks in Norway last Friday in which 76 people died, local media reported on Wednesday, according to RIA Novosti.

Norwegian media printed pictures of a man, who according to the police, may be very dangerous to the public.

Police put him on the national wanted list after he was released from prison on Monday although psychiatrists said he was mentally unstable and posed a danger to society.

"One could say he is mentally unstable judging by his behavior. He also said that he identified himself with Breivik, accused of killing 76 people," Norwegian TV-2 channel reported.

During a closed hearing at a Norwegian court on Monday, Breivik, 32, admitted to carrying out a bombing in Oslo that killed seven people, and a mass shooting at a Labor Party youth camp on the nearby island of Utoya.

Police have now revised the death toll from both attacks from 93 to 76.