Norwegian mass killer Anders Behring Breivik is suing the state for allegedly violating his human rights due to his being held in extreme isolation, and has filed another application for parole, his lawyer said on Friday. Breivik, now 44, is serving Norway's longest sentence, 21 years, which can be extended if he is still considered a threat.

He's suing the state because he has been in extreme isolation for 11 years, with no contact with other people except his guards. In 2017, he lost a human rights case regarding his near-isolation in a three-room cell.

Last year, his parole application was also rejected, citing the risk of violence. His lawyer expects the lawsuit to be heard next spring. The right-wing militant killed 77 people, most of them teenagers, in Norway's worst peacetime atrocity in July 2011.