Anders Breivik threatens to go on hunger strike over 'deterioration of prison conditions'

The mass murderer killed 77 people in 2011

The convicted killer wrote a letter to the media complaining of the apparent worsening of his prison conditions (ODD ANDERSEN/AFP/Getty Images)

Mass murderer Anders Breivik has threatened to starve himself to death over the apparent worsening of his prison conditions.

Breivik, 36, is currently serving 21 years in prison for killing 77 people in 2011 after he detonated a bomb outside a government building in Oslo and opened fire at a political youth camp on Utøya island.

According to The Local, Breivik sent a letter to Norwegian and Swedish press which says that, since September 2nd, he has been confined to a single cell which he can only leave for one hour a day.

He also complains of being given less communication time with prison staff.

He wrote: “Unless the 02/09/15 escalation is reversed, I will eventually continue the hunger strike until death. I cannot stand anymore.”

Breivik said the “deterioration of prison conditions” has also forced him to abandon his university studies, which were “the only thing [he] had.”

The prisoner was admitted a place on a political science degree at Oslo University in July this year, allowing him to study from his cell but prohibiting any contact with staff or students.

His lawyer is currently taking legal action against the Norweigan state over his client’s prison conditions. He confirmed Breivik will go “on hunger strike until death,” according to The Local.

Breivik is currently serving the maximum amount of sentence time allowed under Norwegian law, however this could be prolonged if he is considered a threat to the public at the end of his sentence.