Norwegian far-right extremist Anders Behring Breivik has shocked a courtroom in Norway with his grisly descriptions of his massacre on an island youth camp.

Survivors of the July 22 rampage were hugging and sobbing, trying to comfort each other during Breivik's testimony Friday in Oslo's district court. That testimony was broadcast to 17 other courtrooms where the relatives of other victims gathered.

He left out no detail from his rampage, explaining how he shot panicked youth at point-blank range. Sixty-nine people, mostly teenagers at an annual summer camp, were killed on Utoya island.

Breivik said: "Some of them are completely paralyzed. They cannot run. They stand totally still. This is something they never show on TV ... It was very strange."