Anders Behring Breivik, the far-right extremist who murdered 77 people in Norway in 2011, including 69 adolescents he shot dead at a youth camp, is to sue the Norwegian government for "torture" over the conditions he is being held under in prison.
Breivik's lawyers will argue that his prolonged solitary confinement is in breach of the European Convention on Human Rights, one of them told Norway's Dagbladet newspaper.
"Human rights apply to him too," Geri Lippestad told the newspaper. "This is not about him getting an easy punishment, he will probably always be a special prisoner with special restrictions.
"But he cannot sit in isolation forever. Now he wants contact with other inmates. The longer he sits in solitary confinement, the greater the chance that he will be harmed by it."
Breivik is serving a 21-year sentence, in a form of preventive detention that can be extended indefinitely as long as he is deemed a danger to society. He is likely to spend the rest of his life in prison.