Anders Behring Breivik, the suspect in the Oslo killings, pleaded not guilty today at a closed arraignment and told the court that his extremist group had "two more cells." He said he intended to "save Europe" through his actions by drawing attention to his anti-Muslim, anti-immigration manifesto.

Updaed at 1:42 p.m. ET: Tens of thousands of Norwegians carrying flowers turn out near Oslo's city hall to mourn the victims of last week's twin attacks.

Updated at 1:08 p.m. ET: Jens David Breivik, father of the suspect in the Oslo killings, says he is horrified by what happened. The former Norwegian diplomat lives in France. He and his first wife separated when their son was very young. He says he lived with him briefly and they became estranged when the boy reached his rebellious teenage years.

In an interview with the Swedish newspaper Expressen, he said he was horrified when he learned that his son was involved.

"I was completely paralyzed," he tells Expressen, according to a Google Translate version of the interview. "I could not believe my eyes. I was completely paralyzed, and I could not believe it was for real. I knew that it was not April 1st and wondered if it really could be possible."

He said he cannot understand how his son, or anyone, could commit such atrocities.

"How could he stand there and kill as many innocent people and just seem to think that what he did was in order. That it would be so. He should have taken his own life also, that he should have done."

Updated at 11:42 a.m. ET: The prosecutor says the suspect in the Norwegian rampage was calm during today's hearing and seems unaffected by the attacks that killed 76 people, the AP reports.

Updated at 11:25: Police lowered the death toll in the island shooting spree to 68, saying the overwhelming task of responding to the tragedy created confusion, the Associated Press reports.

Police had said 86 people died when a gunman fired on a retreat for young people on an island near Oslo. The rampage followed a bombing outside the government's headquarters. Police raised the toll in that attack to eight Monday.

That brings the new toll to 76 people -- still one of the worst modern mass murders in peacetime.

Police spokesman Oystein Maeland said the higher, erroneous figure emerged as police and rescuers were focusing on helping survivors and securing the area, AP says

Update at 10:11 a.m. ET: Here is what Judge Kim Heger said about the suspect's claim to the existence of two more cells to his extremist organization: "The accused has made statements today that require further investigation, including that 'there are two more cells in our organization.'"

Update at 9:54 a.m. ET: The suspect was ordered held for eight weeks, the first four in complete isolation, without access to visitors or the right to write letters. After eight weeks, the prosecution can return to the court and request that he be held longer, according to a court official.

Update at 9:49 a.m. ET: The suspect in the Oslo killings told the court today about two further cells in his organization.

A statement by the court said he also spoke of such cells to police.

Update at 9:43 a.m. ET: Breivik pleaded not guilty, saying he wanted to save Europe and send a strong signal, not to kill as many as possible, the judge says.

Update at 9:40 a.m. ET: The judge ruled that the suspect, Anders Behring Breivik, would be held for at least eight weeks, four of that in complete isolation, without the right to have visitors or write letters.

Update at 9:33 a.m. ET: The suspect in the Oslo killings has been charged with committing acts of terrrorism and will be held in isolation for four weeks, a judge in Oslo rules.

Update at 9:12 a.m. ET: The suspect in the Oslo killings appeared in court behind closed doors today for a 40-minute arraignment, the BBC reports.

It was the first public appearance by the 32-year-old suspect, Anders Behring Breivik, since Friday's bombing and shooting spree.

The court closed the hearing at the request of police.

"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," Judge Kim Heer said in a statement today. Breivik, who has admitted to the killings but has not accepted criminal responsibility, had hoped to use the hearing to expound on his anti-Muslim, anti-immigration platform.

Update at 9:01 a.m. ET: The closed hearing for the suspect in the Olso attacks has ended, the Associated Press reports.

Original posting: A Norwegian court will hold today's arraignment behind closed doors for the suspect in the deadly twin attacks in Oslo, the Associated Press reports.

A spokesman for the Oslo district says the judge acted on the request of police.

Norwegian prosecutors, who sought the closed hearing, will seek eight weeks of pretrial detention for the 32-year-old suspect, Anders Behring Breivik, the AP reports.

In a manifesto published online, Breivik made it clear he saw the killings as an opportunity to publicize his views that Europe must be saved from Muslim colonization.

The Norwegian called the attacks -- a bombing in Oslo and shootings at a youth camp outside the capital -- as "marketing" for the manifesto.

His lawyer, Geir Lippestad, told Norwegian broadcaster NRK that Breivik has requested to appear in uniform during today's hearing, but Lippestad didn't know what kind.

Breivik has confessed he was behind the twin attacks but denies criminal responsibility.

In his manifesto and comments to his lawyer, he has said he wanted to start a revolution to inspire Norwegians to retake their country from Muslims and other immigrants.

He blames liberals for championing multiculturalism over Norway's "indigenous" culture.