Prosecutors pressed mass killer Anders Breivik for details about the anti-Muslim militant group he claims to belong to on the third day of his trial for the massacre of 77 people.
An irritated Breivik repeatedly refused to answer questions about who the other members of the network are, or to give details of the meetings he claims to have had with them.
Prosecutors have said they do not believe Breivik's so-called "Knights Templar" group exists.
Breivik insists it does, and said police just had not done a good enough job in uncovering it.
The issue is of key importance in determining Breivik's sanity, and whether he is sent to prison or compulsory psychiatric care for the July 22 bomb and shooting massacre.