Hundreds of relatives of those killed in the shooting spree on Utoya Island made their first pilgrimage to the scene of the crime where Anders Behring Breivik committed the largest peacetime attack Norway has ever seen.

The family members were boated over to the holiday island, some 25 miles from Oslo, nearly one month after Breivik, dressed as a policeman, ran wild with rifles and pistols, killing members of a youth camp at will.

When he had finished, 69 were killed, nearly half of whom were under the age of 18.

The family members placed small shrines marking the final resting places of loved ones. To help them, police officers had marked each spot.

Forensic experts have combed the island to pinpoint the last moments of the dead as they tried to hide, flee, and swim to safety, even bringing Breivik back last week to recreate the horrific details of the hour-long event.

As the 500 or so relatives walked the small island, psychiatrists were on hand to assist those for whom the experience became overwhelming.

Later in the day, the majority of the 517 survivors - 66 of whom were injured - will take part in a separate visit.

Norway Victims Families Return to Site 1 of 10
A general view shows Utoeya island August 19, 2011. Some 500 relatives of the 69 people gunned down by Norwegian mass killer Anders Behring Breivik, gathered on the island where they died on Friday, to mourn and to hear from police exactly where and how they were killed, ahead of a national day of remembrance across the country. Breivik has admitted killing 77 people on July 22, including eight in a bombing in central Oslo. REUTERS
Norway Victims Families Return to Site 5 of 10
Picture shows flowers and candles at the temporary memorial site on the shore in front of Utoeya island, northwest of Oslo August 19, 2011. Some 500 relatives of victims are expected to gather on the island of Utoeya to mourn and to hear from police exactly where and how they were killed. Norwegian Anders Behring Breivik has admitted killing 77 people last month, including eight in a bombing in central Oslo. REUTERS
Norway Victims Families Return to Site 6 of 10
People arrive on a pontoon bridge boat at Utoeya island, northwest of Oslo August 19, 2011. Some 500 relatives of victims are expected to gather on the island of Utoeya to mourn and to hear from police exactly where and how they were killed. Norwegian Anders Behring Breivik has admitted killing 77 people last month, including eight in a bombing in central Oslo. REUTERS
Norway Victims Families Return to Site 7 of 10
People arrive at Utoeya island, northwest of Oslo August 19, 2011. Some 500 relatives of victims are expected to gather on the island of Utoeya to mourn and to hear from police exactly where and how they were killed. Norwegian Anders Behring Breivik has admitted killing 77 people last month, including eight in a bombing in central Oslo. REUTERS
Norway Victims Families Return to Site 8 of 10
People arrive on a pontoon bridge boat at Utoeya island, northwest of Oslo August 19, 2011. Some 500 relatives of victims are expected to gather on the island of Utoeya to mourn and to hear from police exactly where and how they were killed. Norwegian Anders Behring Breivik has admitted killing 77 people last month, including eight in a bombing in central Oslo. REUTERS
Norway Victims Families Return to Site 9 of 10
People arrive at Utoeya island, northwest of Oslo August 19, 2011. Some 500 relatives of victims are expected to gather on the island of Utoeya to mourn and to hear from police exactly where and how they were killed. Norwegian Anders Behring Breivik has admitted killing 77 people last month, including eight in a bombing in central Oslo. REUTERS
Norway Victims Families Return to Site 10 of 10
A ferry passes in front of Utoeya island during final preparations before relatives of the victims, and survivors are expected to visit the island, northwest of Oslo August 18, 2011. Norwegian mass killer Anders Behring Breivik, 32, has confessed to the bomb and gun attacks which killed 77 people on July 22, 69 of them at a Labour Party youth summer camp on Utoeya island. REUTERS