Norway's domestic intelligence chief said Wednesday there was no evidence that the gunman who admitted last week's twin attacks had links to other cells in the country or in Britain.

Janne Kristiansen also rejected defence arguments that suspected killer Anders Behring Breivik was insane, saying that he was sane and "total evil."

"I can tell you on a general basis that so far we don't have any evidence of of other cells, neither in Norway nor in Britain," Kristiansen told the BBC.

"We are having the highest focus on this question (of other cells) and we have had this focus since Friday but so far after four days we don't have any evidence," she added.

Media reports this week citing a manifesto written by Breivik said he had links to the British far-right and claimed to have been in touch with the English Defence League (EDL).

Kristiansen said possible meetings with the group were "something that we are looking closely into and that of course British MI5 is looking closely into."

The EDL has denied it had any contact with Breivik.

Breivik's lawyer Geir Lippestad told journalists on Tuesday that the case indicated his client was insane, adding that a medical evaluation would be carried out to establish his client's psychiatric condition.

Kristiansen rejected the suggestion.

"I have been a defence lawayer before and in my opinion this is clearly a sane person because he has been too focused for too long and he has been doing things so correctly," she said.

"In my experience of having had these sorts of clients before, they are normally quite normal but they are quite twisted in their minds, and this person in addition is total evil."

A bombing in Oslo and shooting on a nearby island on Friday left 76 people dead, the worst bloodshed in the country since WWII.