Police say they will again interrogate on July 29 the Norwegian man who admitted killing 76 people in a bombing and youth camp massacre.
The interrogation will be only the second time police have quizzed far-right extremist Anders Behring Breivik after his arrest in the wake of the twin attacks on July 22 in Oslo and on an island near the capital.
Norwegian security officials said they were increasingly confident that Breivik acted without accomplices or a network of fellow extremists.
However, prosecutors warned that Breivik would not go on trial before 2012 because of the complexity of the investigation.
Police also said on July 28 that they have ended the search for bodies near Utoeya island, where Breivik killed 68 people at a summer camp of the ruling Labor Party youth wing.
A woman from Georgia on July 28 was confirmed killed on Utoeya island, one of several foreigners among the attack's 76 victims.
compiled from agency reports