A court in Oslo on Wednesday partially upheld the claims of mass killer Anders Behring Breivik that he is subjected to prison conditions that violate his human rights.
"The prison conditions of Anders Behring Breivik represent an infringement of article three of the human rights convention," the court said, referring to law against inhumane treatment.
The Norwegian right-wing extremist, who killed 77 people in 2011, had sued the state and prison authorities over restrictions he faces while serving his 21-year prison sentence for the attacks, considered the worst acts of violence in Norway since World War II.
He cited that five years of strip searches, censored mail and isolation in prison amount to "inhumane" treatment.
The court ruled in favour of Breivik over his claims about the time spent in isolation, the reasons for the conditions, the limited ability to complain and compensation.
However it ruled against the plaintiff over his human rights concern about being deprived of contact with the outside world.
At a hearing a month ago at Skien prison, south of Oslo, where Breivik is serving his sentence, Breivik's attorney argued that Breivik is "mentally vulnerable" and expressed concern that continued isolation would harm him.
The state's attorneys argued that the stringent prison conditions were necessary as Breivik still poses a threat to society and visitors, citing testimony from prison wardens and a psychiatrist.
Breivik said the aim of his attacks was to punish the Labour Party, then in office, over its failure to stem the flow of Muslim immigrants and multiculturalism.