Anders Behring Breivik has confessed to killing at least 76 people in the shootings on the island of Utoeya and a bomb attack in the Norwegian capital Oslo.
On Tuesday, Norwegian police named the first four victims, and published the names of a further 13 victims on Wednesday.
The police will continue to release the other names once they have been identified and their families informed.
Of the names released Wednesday, 12 were among the 68 shot dead on Utoeya, the island that was hosting a summer camp run by the youth wing of Norway's ruling Labor Party. Most of the victims were less than 20 years old.
The other victim was one of the eight people killed by Friday's car bomb in central Oslo.
Here is a look at some of the victims lost in last Friday's tragedy.
Eivind Hovden (15) from Tokke, who has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island, is seen in this undated photo. REUTERSJohannes Buoe (14) from Mandal, who has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island, is seen in this undated photo.REUTERSHaakon Oedegaard (17) from Trondheim, has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island.REUTERSSimon Saeboe (18) from Salangen, who has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island, is seen in this undated photo.REUTERSSilje Merete Fjellbu (17) from Tinn, who has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island, is seen in this undated photo. REUTERSSyvert Knudsen (17) from Lyngdal, who has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island, is seen in this undated photo.REUTERSBirgitte Smetbak (15) from Noetteroey, who has been confirmed as one of those killed in the July 22 bomb attack in central Oslo and shooting rampage in Utoeya island, is seen in this undated photo. REUTERSAn undated picture of Sharidyn Meegan Ngahiwi Svebakk-Boehn, made available on July 27, 2011 by her family. Police confirm that Sharidyn Meegan Ngahiwi Svebakk-Boehn was killed during shooting at Utoya on July 22, 2011.REUTERSDiderik Aamodt Olsen, 19, from Nesodden smiles in an undated photo. Olsen was identified as one of the victims in last Friday's shooting spree on Utoeya island, northwest of Oslo, according to local media.REUTERSHanne Fjalestad, 43, from Lunner smiles in an undated photo. Fjalestad, who was originally from the Danish city of Herning, was identified as one of the victims in last Friday's shooting spree on Utoeya island, northwest of Oslo, according to local media.REUTERSBano Abobakar Rashid, 18, from Nesodden smiles in an undated photo. Rashid was identified as one of the victims in last Friday's shooting spree on Utoeya island, northwest of Oslo, according to local media.REUTERSMargrethe Boeyum Kloeven, 16, from Baerum smiles in an undated photo. Kloeven was identified as one of the victims in last Friday's shooting spree on Utoeya island, northwest of Oslo, according to local media. REUTERS
