A woman from Georgia who was missing since the shootings on Norway's Utoeya island was confirmed Thursday to have been killed in the massacre, the Georgian foreign ministry said.

Tamta Liparteliani went on behalf of a Young Socialists organisation to the youth camp in Norway where the lone gunman's attack took place, along with another Georgian woman who survived the shootings.

The Georgian foreign ministry said Liparteliani had been identified by her fingerprints.

"Unfortunately our worst fears have been confirmed," Deputy Foreign Minister Nino Kalandadze told local media. It has not been possible to confirm her age.

Liparteliani's parents travelled to Norway on Wednesday in an attempt to find out what had happened to their daughter.

Anders Behring Breivik has confessed to killing at least 76 people in the shooting spree on the island and a bomb attack in the Norwegian capital Oslo.

In a letter of condolence to Norwegian Prime Minister Jens Stoltenberg on Saturday, Georgian President Mikheil Saakashvili said that "this terrible atrocity once again reminds us that terrorism remains one of the main common challenges of the world today."