Norwegian authorities are allowing confessed killer Anders Behring Breivik out of solitary confinement as he awaits trial for murdering 77 people in July.

Police prosecutor Christian Hatlo said Thursday that investigators are increasingly confident that the confessed mass killer did not have any accomplices when he allegedly opened fire at a youth camp outside of Oslo and set off a bomb in the capital's government district.

Hatlo says it is for that reason that authorities will not request a judge extend the 32-year-old's solitary confinement when it expires next Monday. However, Breivik will remain separate from other prisoners for his own safety.

Since his July 22 arrest, Breivik has been held in solitary confinement following his claim that there were up to 80 cells in Europe with militant anti-Islamic ideals like his own ready to strike. Police say they have found no evidence that any of those cells exist.

Norwegian police have asked authorities in 20 nations to bring in people for questioning to find out more about Breivik's contacts and purchases of bomb-making materials.

Even though Breivik confessed to the killings, his lawyer says he denies criminal responsibility because he believes the massacre was needed to save Norway and Europe from an influx of Muslims and to punish politicians for embracing multiculturalism.