Norwegian police will ask for an additional four weeks in solitary confinement for the man behind the country's July 22 attacks, an Oslo court said in a statement Monday.
On July 25 the court ruled that self-confessed mass murderer Anders Behring Breivik could be held in custody for eight weeks, including four weeks in solitary confinement.
The maximum renewable custody period is usually four weeks in Norway but Behring Breivik's detention was extended given the exceptional nature of the case.
At a Friday hearing, an Oslo judge will decide whether to grant police's request for an extended solitary confinement, but will not have to rule on prolonging the custody period, which does not expire until September 26.
The court will on Wednesday decide whether the hearing will be closed, as police have requested. Behring Breivik's previous appearance in court was not open to the public.
Behring Breivik, 32, has admitted killing 77 people in the twin attacks last month.
He shot dead 69 people at a youth summer camp hosted by Norway's ruling Labour Party on a island outside Oslo, while another eight were killed earlier after he set off a car bomb outside government offices in the capital.
Behring Breivik, who insists he acted alone, has said he was on a "crusade" to stop a "Muslim invasion" of Europe.
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