http://www.bbc.co.uk/news/world-europe-14354216Anders Behring Breivik was questioned for 10 hours on Friday to verify details from previous sessions and answer new points.
Police would not confirm reports that he had considered attacking the palace and Labour Party headquarters.
Mr Breivik, an anti-Muslim extremist who blamed Labour for increased immigration, is believed to have single-handedly shot dead 69 people at a party summer camp on the island of Utoeya, hours after killing eight with a car bomb near government buildings in central Oslo.
Police lawyer Paal-Fredrik Hjort Kraby said the suspect had talked about other targets. Without citing its sources, Norwegian tabloid Verdens Gang reported that the suspect had considered attacking the royal palace because of its symbolic value, and Labour HQ because of his loathing for the party.