Experts told a Norwegian court on Wednesday that the mass murderer Anders Behring Breivik does not suffer from a mental illness, in a trial to determine whether the convicted far-right terrorist could be released early on parole.

Anders Behring Breivik, the Norwegian mass murderer behind the country's worst peacetime atrocity, should not be released and remains dangerous, a prosecutor said, as Breivik appeared in court on Tuesday seeking release after over 13 years in prison.

Norwegian far-right extremist Anders Behring Breivik, who killed 77 people in a bombing and shooting rampage in 2011, has made another application for parole after spending more than a decade behind bars.