The ceremony began with a welcome speech by the representative of the National Support Group, Tor Inge Kristoffersen, it was also addressed by the Norwegian Prime Minister, Jonas Gahr Store, according to the local newspaper Aftenposten.
On July 22, 2011, exactly 11 years ago, Anders Behring Breivik detonated a car bomb in the government district of Oslo and opened fire at a summer camp on the island of Utoya, where most of the 69 victims were teenagers.
Breivik, a 32-year-old ethnic Norwegian right-wing extremist, was arrested by police later that day, he confessed to both crimes.
After 8 years in prison, he applied for parole and in 2015, sued the State for a violation of his rights.
Although both petitions were rejected by a provincial court.
Authorities consider him to be the most vicious terrorist in modern Norwegian history and he still represents a danger to society.