Norwegian mass killer Anders Behring Breivik complained at a court hearing on Monday that keeping him in solitary confinement in prison was a form of "torture" after a judge ordered that he remains in isolation for another four weeks, according to Reuters. Breivik, who has admitted killing 77 people on July 22, has been kept in isolation for two months. Under Norwegian law, solitary confinement can only be imposed for four weeks at a time, but the prosecution is free ask for an extension when the term runs out. Eight of Breivik's victims were killed in a bombing in Oslo that destroyed the Norwegian government's headquarters and 69 were gunned down on a nearby island. Judge Anne Margrethe Lund said the isolation was necessary to hinder Breivik from communicating with potential accomplices, whose existence the police need to investigate further.