A picture taken on July 22, 2011 from a helicopter flying over Utoya island shows an attacker walking with a gun in his hands among bodies on the island (pixellated by the image's source), during the shooting spree at a youth summer camp that left at least 86 dead. Police have arrested Anders Behring Breivik, a man with ties to far-right groups, for the shooting and also for the bomb attack which struck downtown Oslo earlier the same day. / Marius Arnesen/AFP/Getty Images
OSLO, Norway The man blamed for killing at least 93 people during terrorist attacks on Norway's government headquarters and an island retreat for young people wanted to trigger an anti-Muslim revolution in Norwegian society, his lawyer said Sunday.
A chief surgeon treating the wounded from Friday's mass shooting, meanwhile, said he believes the attacker used special "dum-dum" bullets that cause massive internal injuries.
The doctor told The Associated Press that the killer's chosen ammo "exploded inside the body."
The manifesto that 32-year-old suspect Anders Behring Breivik published online ranted against Muslim immigration to Europe and vowed revenge on those "indigenous Europeans" whom he deemed had betrayed their heritage. The document said they would be punished for their "treasonous acts."
Police said they were analyzing the approximately 1,500-page document. They said it was published Friday shortly before the back-to-back bomb and gun attacks.
Breivik's lawyer, Geir Lippestad, said his client wrote the document alone. While police said they were investigating reports of a second assailant on the island, the lawyer said Breivik claims no one helped him.
The treatise detailed plans to acquire firearms and explosives, and even appeared to describe a test explosion: "BOOM! The detonation was successful!!!" It ends with a note dated 12:51 p.m. on July 22: "I believe this will be my last entry."
That day, a bomb killed seven people in downtown Oslo and, about 90 minutes later, a gunman began opening fire on about 600 young people at a retreat on Utoya Island. Police said the death toll in the shooting rose by one Sunday to 86.
That brings total fatalities to 93, with more than 90 wounded. People remain missing at both scenes. Police have not released the names of any victims.
Authorities revealed Sunday that one of the attacker's first victims on the island was an off-duty police officer who had been hired by the camp directors to provide private security in his spare time. Oslo Police Union Chairman Sigve Bolstad declined to identify the victim.
That detail sheds new light on the confusion many survivors described during the 90-minute massacre. The attacker arrived dressed as a policeman, and some campers were killed when they approached the killer thinking he was there to save them.
Dr. Colin Poole, head of surgery at Ringriket Hospital in Honefoss northwest of Oslo, told The Associated Press the gunman used special bullets designed to disintegrate inside the body and cause maximum internal damage. Poole said surgeons treating 16 gunshot victims have recovered no full bullets.
"These bullets more or less exploded inside the body," Poole said. "It's caused us all kinds of extra problems in dealing with the wounds they cause, with very strange trajectories."
Ballistics experts say the so-called "dum-dum" bullets also are lighter in weight and can be fired with greater accuracy over varying distances. They commonly are used by air marshals and hunters of small animals. Such characteristics potentially would have allowed the gunman to carry more ammunition and fire his weapons at varying targets without adjusting his sights.
Officials at the lakeside scene of the island shooting spent Sunday continuing to account for the dead.
Six hearses pulled up at the shoreline as orange-jacketed Red Cross searchers on small boats slowly explored the extensive shoreline.
Body parts remain inside the Oslo building, which housed the prime minister's office. In a chilling allusion to the fact that the tragedy could have even been greater, police said Sunday that Breivik still had "a considerable amount" of ammunition for both his guns a pistol and an automatic rifle when he surrendered.
Police and his lawyer have said that Breivik confessed to the twin attacks, but denied criminal responsibility for a day that shook peaceful Norway to its core and was the deadliest ever in peacetime. Breivik has been charged with terrorism and will be arraigned Monday.
Lippestad said his client has asked for an open court hearing "because he wants to explain himself."
Police Chief Sveinung Sponheim said a forensics expert from Interpol was joining the investigation Sunday.
European security officials said they were aware of increased Internet chatter from individuals claiming they belonged to the Knights Templar group that Breivik describes, in fantastical terms, in the manifesto. They said they were still investigating claims that Breivik, and other far-right individuals, attended a London meeting of the group in 2002. The two officials spoke on condition of anonymity because they were not authorized to speak about the investigation.
The officials would not confirm whether they had identified Breivik as a potential threat.
As authorities pursued the suspect's motives, Oslo mourned the victims. Norway's King Harald V and his wife Queen Sonja and Prime Minister Jens Stoltenberg crowded into Oslo Cathedral, where the pews were packed, and people spilled into the plaza outside. The area was strewn with flowers and candles, and people who could not fit inside the grand church huddled under umbrellas amid drizzling rain.
The king and queen both wiped tears from their eyes during the service themed on "sorrow and hope."
Afterward, people sobbed and hugged one another in the streets. Many lingered over the flowers and candles. The royal couple and prime minister later visited the site of the bombing in Oslo. The royals then visited shooting survivors at Ringriket Hospital.
The attacker picked targets linked to Norway's left-wing Labor Party. Breivik's manifesto pilloried the political correctness of liberals and warned that their work would end in the colonization of Europe by Muslims.