Norwegian mass murderer Anders Behring Breivik accused prison officers of trying to drive him to suicide in conditions he describes as "a mini Abu Ghraib", Independent.ie reports.

Breivik wrote a 27-page letter addressed to prison officials, a copy of which was obtained by journalists.

"If it wasn't for the fact that I am an exceptionally patient person, I would most likely have lost my mind in pure frustration," Breivik said in the letter dated October 15, that was updated on October 26 and October 30. "Anyway, there are limits to what a person can take."

Breivik wrote he is frustrated that guards do not cooperate with his carefully planned daily schedule, where he times his various activities down to the minute.

"One cannot exclude that Ila Prison's leadership has assured itself that 'loyal social democrats' dominate the ward to prevent possibly benevolent people gaining access," Breivik said.

He also alleges that the prison director keeps the security regime tight out of personal vengefulness against Breivik.

The 33-year-old right-wing fanatic killed 77 people last year in Norway's worst peacetime massacre. He detonated a car bomb outside government offices in Oslo killing eight people and then drove to the island of Utoya where he massacred 69 members of the Labor Party's youth wing.