Norway's twin terror attacks suspect Anders Behring Breivik, left, sits in an armored police vehicle after leaving the courthouse following a hearing in Oslo Monday July 25, 2011 where he pleaded not guilty to one of the deadliest modern mass killings in peacetime. The man who has confessed to carrying out a bombing and shooting spree that left 93 people dead in Norway will be held in complete isolation for four weeks after a hearing in which he said his terror network had two other cells. (AP Photo/Aftenposten/Jon-Are Berg-Jacobsen)
August 4, 2011 7:16:55 AM PDT
OSLO, Norway - August 4, 2011 --
A Norwegian prosecutor said Thursday he is concerned that the confessed perpetrator of last month's attacks that killed 77 people is declining to give information that could determine if he had accomplices.