Norway Sunday commemorated one year since 77 people were killed and 242 injured in gun and bomb attacks in Oslo and on the island of Utoeya.
Prime Minister Jens Stoltenberg laid a wreath in Oslo and was joined by the families of the dead, BBC reported.
The trial for Anders Behring Breivik, who has admitted carrying out the two attacks, continues. Eight people were killed in the bombing in Oslo and 69 died in a shooting spree on Utoeya island.
"The killer failed, the people have won. It's been a very heavy year for all of us. Not a day has passed the tragedy has not filled the room," Stoltenberg said at the wreath-laying ceremony.
Most of the dead were youth activists of the Labour Party who were staying on Utoeya as part of a summer camp.
Hundreds of relatives held a private service on Utoeya Sunday.
Christin Bjelland, the mother of a survivor, said the commemorations were especially important for the bereaved.
"What happened here is so huge, there were so many affected, that I think it means a lot to come together for those who wish and feel the love and care between all the affected," she said.
Breivik has tried to justify the attacks by claiming he was trying to stop Muslims from taking over Norway.
Judges will rule next month whether Breivik is sane or insane, and therefore whether he will be given a long prison sentence or sent to a secure psychiatric ward.