Norwegian mass murderer Anders Breivik says his prison is inhumane

Norwegian mass murderer Anders Breivik, who is serving a 21-year sentence for killing 77 people, has complained that he is being held in inhumane conditions and is being denied freedom of expression.

Breivik said he was not getting enough butter to spread on his bread, was having to drink his coffee cold and was not able to keep a moisturiser in his cell - which, to his dismay - is sparsely decorated and has no view.

"I highly doubt that there are worse detention facilities in Norway," the right-wing extremist, who killed 77 people in a bombing and shooting frenzy last July, wrote in the letter to Norway's correctional services, according to tabloid Verdens Gang.

He also said that the handcuffs he had to wear when being transferred were razor sharp and "cut into his wrists".

One of Breivik's lawyers had revealed on Thursday that his client believed his prison conditions "breached human rights", but survivors scoffed at his gripes.

Breivik earned international notoriety last year when he detonated a bomb outside the government's headquarters on July 22 and then went on the rampage at a Labour Party youth camp on the island of Utoeya, killing 77, many of them teenagers.

The far-right extremist was sentenced in August to 21 years in jail for "acts of terror" over the worst peacetime atrocity in Norway, and is now being held in near complete isolation at a high-security prison outside Oslo.

Tord Jordet, one of his lawyers, confirmed the letter's authenticity. Norway's justice ministry declined to comment.

Breivik should also have access to an exercise room and a computer room. However, access to those facilities is controlled by the prison authorities who, according to Jordet, have not replied to his requests in recent weeks to use the computer.

Wanting to correspond with his supporters and to write books, Breivik only had use of a pen, which he considered very inconvenient, Jordet said.

But Eivind Rindal, a survivor of the Utoeya rampage, said he was unmoved by Breivik's "crocodile tears".

"Breivik has to remember that it's not shoplifting a pair of socks that he's convicted of," Rindal told the tabloid.

"It is easy to see him as a cynical and cunning threat who could harm himself and others, and who could potentially inspire others like him."

During his trial, Breivik showed little emotion and no remorse. He said his slaughter was "cruel but necessary" to protect Norway from multiculturalism.