The man who has admitted carrying out Friday's twin terror attacks in Norway, Anders Behring Breivik, made his first appearance in court in Oslo yesterday.
The hearing was held behind closed doors, as ruled by the judge, who will make a statement later.
A minute's silence was held at 1200 (1000 GMT) to remember the victims.
Breivik, 32, has admitted carrying out a bombing in Oslo, and a massacre on an island youth camp, killing at least 93 people in total.
He is said to be linked to far-right groups and to have spent years planning the attacks.
At least 96 people were injured in the attacks. But Oslo police have said the death toll from the shooting spree on the island could be revised downwards from the current 86, based on the information now available.
Breivik said before the court hearing he would explain his actions to the court.
There have been calls for a media blackout of the trial so as not to give Breivik a platform for his views.
Judge Kim Heger ruled on yesterday's hearing: "It is clear that there is concrete information that a public hearing with the suspect present could quickly lead to an extraordinary and very difficult situation in terms of the investigation and security."
The hearing lasted about 40 minutes. Television pictures showed what appeared to be Mr Breivik being driven away in a convoy of vehicles.
Under Norwegian law, Breivik faces a maximum of 21 years in jail if convicted, although that sentence can be extended if a prisoner is deemed a threat to the public.
Police said that while the suspect had admitted the killings, he had not accepted criminal responsibility for them.
His lawyer, Geir Lippestad, told Norwegian media on Sunday: "He thought it was gruesome having to commit these acts, but in his head, they were necessary.
"He wished to attack society and the structure of society."
At 1200 local time yesterday, Prime Minister Jens Stoltenberg, at Oslo University, said: "In remembrance of the victims... I declare one minute's national silence."
Thousands of people stood around a carpet of flowers at Oslo cathedral.
One Oslo citizen, Sven-Erik Fredheim, told Reuters: "It is important to have this minute of silence so that all the victims and the parents of the families know that people are thinking about them."
It was reported yesterday that Crown Princess Mette-Marit's stepbrother, Trond Berntsen, an off-duty police officer, was among those killed at the youth camp. He was the son of Mette-Marit's stepfather, who died in 2008.
In France, police are searching Breivik's father's home in Couranel in the south of the country, although they have not commented on the operation. Jens Breivik is reported not to have been in touch with his son for many years.
Source : The Daily Star
