People light candles and lay flowers in central Oslo on July 23, 2011 to pay tribute to the victims of twin attacks at the government headquarters building in Oslo and on a youth camp, Norway's deadliest post-war tragedy. At least 91 people died the day before in a shooting at a summer school meeting organised by the ruling Labour Party on Utoeya, an island outside the capital, while seven were killed when a powerful bomb ripped through central Oslo, where the prime minister's office and several government buildings are located. AFP PHOTO / JAN JOHANNESSEN

A man puts flower tribute in front of the Embassy of Norway in Moscow, Russia, Saturday, July 23, 2011, in memory of the explosion and shooting victims. A homegrown terrorist set off the explosion that ripped open buildings in the heart of Norway's government, then according to reports he went to a summer camp dressed as a police officer and gunned down youths as they tried to escape the attack, police said Friday. (AP Photo/Mikhail Metzel)

A man puts a flower tribute at the entrance in front of the Embassy of Norway in Moscow, Russia, Saturday, July 23, 2011, in memory of the explosion's and shooting's victims. A homegrown terrorist set off the explosion that ripped open buildings in the heart of Norway's government, then went to a summer camp dressed as a police officer and gunned down youths as they ran and even swam for their lives, police said Friday. (AP Photo/Mikhail Metzel)

People lay flowers in front of the Domkirke church in homage to July 22 victims of the bomb attacks and shooting? on July 23, 2011 in Olso. Norwegian Prime Minister Jens Stoltenberg today declared the twin shooting and bomb attacks which killed at least 91 people "a national tragedy." "Never since the Second World War has our country been hit by a crime on this scale," Stoltenberg told a press conference. AFP PHOTO / SCANPIX - MORTEN HOLM == NORWAY OUT

People light candles in Oslo Cathedral on July 23, 2011 to pay tribute to the victims of twin attacks at the government headquarters building in Oslo and on a youth camp, Norway's deadliest post-war tragedy. Police said they were questioning a Christian fundamentalist today over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SCANPIX / MORTEM HOLM ***NORWAY OUT***

People light candles in Oslo Cathedral on July 23, 2011, to pay tribute to the victims of twin attacks at the government headquarters building in Oslo and on a youth camp, Norway's deadliest post-war tragedy. Police said they were questioning a Christian fundamentalist today over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SCANPIX / MORTEM HOLM ***NORWAY OUT***

US Megan Will (R) and Norwegian Santina Crolles light candles in Oslo Cathedral on July 23, 2011, to pay tribute to the victims of twin attacks at the government headquarters building in Oslo and on a youth camp, Norway's deadliest post-war tragedy. Police said they were questioning a Christian fundamentalist today over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SCANPIX / MORTEM HOLM ***NORWAY OUT***

Norwegian Prime Minister Jens Stoltenberg (C) speaks to the press after a meeting with relatives and survivors of the twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war.tragedy. Police said they were questioning a Christian fundamentalist today over twin attacks on a youth camp and the government headquarters that killed 91 people. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SCANPIX / Aleksander Andersen NORWAY OUT

Norwegian Prime Minister Jens Stoltenberg (C) speaks to journalists after a meeting with relatives and survivors of the twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war.tragedy. Police said they were questioning a Christian fundamentalist today over twin attacks on a youth camp and the government headquarters that killed 91 people. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SCANPIX / Aleksander Andersen NORWAY OUT

People gather outside the Oslo Cathedral to mourn and show their respect for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

People gather outside the Oslo Cathedral to mourn and show their respect for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, in front of flowers and candles on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

People gather outside the Oslo Cathedral to mourn and show their respect for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, in front of flowers and candles on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

People gather outside the Oslo Cathedral to mourn and show their respect for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, in front of flowers and candles on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

People gather outside the Oslo Cathedral to mourn and show their respect for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, in front of flowers and candles on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

People gather outside the Oslo Cathedral to mourn and show their respect for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, in front of flowers and candles on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

Silje Kulmo lights a candle at Oslo Domkirke for the victims of the July 22 shooting at a Norwegian Labour Youth League camp, on July 23, 2011. Police said they were questioning a Christian fundamentalist Saturday over twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman dressed as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / JAN JOHANNESSEN

Norwegian Prime Minister Jens Stoltenberg (L) embraces Eskil Pedersen, the leader of the Norwegian Labour Youth league and survivor of the Utoeya island shooting, at a hotel where survivors of the youth camp attack are being reunited with their families in Sundvolden, some 40 km south west of Oslo, on July 23, 2011. At least 91 were killed in Friday's attacks in Norway, a bombing in central Oslo and a shooting spree on an island just outside the capital, and the figure could rise, a senior police officer said. Police had also found explosives on the island of Utoeya, where a gunman opened fire on young people at a summer camp organised by the ruling Labour Party, Sveinung Sponheim, acting commissioner for Oslo police, told reporters. AFP PHOTO / ODD ANDERSEN

Carlo Baldmin and his daughter Cillie place flowers in front of the Norwegian Embassy in Copenhagen on July 23, 2011. Police said they were questioning a right-wing Christian on Saturday over the twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman posing as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SOEREN BIDSTRUP - SCANPIX DENMARK

The Norwegian flags have been put at half mast outside the Norwegian Folk Museum in Bygdoey one day after a bomb attack and a shooting spree, in Oslo on July 23, 2011. The shooting and bomb attacks in Oslo and a nearby island have killed at least 92 people, according to a new death toll released by Norwegian police on Saturday. Police are holding a single suspect over the bomb attack near the prime minister's office that killed seven people and a shooting some two hours later on a nearby island, where at least 85 people at a youth camp were killed. AFP PHOTO / SCANPIX NORWAY - ERIK JOHANSEN = NORWAY OUT

A picture taken on July 23, 2011 shows flowers outside Oslo Cathedral where people pay their respect to victims of the July 22 twin attacks on a youth camp and the government headquarters that killed 91 people in Norway's deadliest post-war tragedy. Police said they were questioning a right-wing Christian on Saturday over the twin attacks on a youth camp and the government headquarters. As harrowing testimony emerged from the holiday island where scores of youngsters were mown down by a gunman posing as a policeman, Norway's premier said the country would emerge stronger from the "cruel act of violence". AFP PHOTO / SCANPIX NORWAY / Berit Roald NORWAY OUT