Anders Behring Breivik "planned three Oslo car bombs"
Norway's confessed mass killer, Anders Behring Breivik, has told his trial he originally planned to detonate three car bombs rather than one.
Breivik said he decided on one such attack in Oslo, because making bombs was more difficult than he expected.
He then came up with the idea of a gun attack on a Labour Party summer camp on the nearby island of Utoeya.
Breivik killed 77 people in the attacks last July. He disputes a report by a psychiatrist describing him as insane.
Arriving in court on day four of his trial, Breivik made no far-right salute, unlike previous days. His lawyers had asked him not to salute.
He also told the court that he used computer games - including World of Warcraft - to rehearse scenarios for his attacks.
The BBC's Steve Rosenberg, at the trial in Oslo, says Breivik is behaving differently from his irritable performance on Wednesday: he is answering
most of the questions put to him and seems calm.