Norway Attacks Live Blog

A memorial concert took place at Oslo's main cathedral on Saturday where rescuers and politicians, particularly those from the ruling labour party attended.

Survivors, victims and their bereaved families also have attended the concert that was broadcast on Norwegian television. 

Al Jazeera's Tania Page reports from Oslo on how the Norwegians reflect amid mourning.

Police officer Havard Gasbakk (R) and chief of police Sissel Hammer are seen during a press briefing in Hoenefoss, July 27, 2011.

Norway's prime minister on Wednesday pledged a security review after a mourning period for at least 76 people killed by a far-right zealot in bombing and shooting attacks that have traumatised the nation.  [image  reuters]

Norwegian police detonated on Tuesday night a cache of explosives found at a farm leased by Anders Behring Breivik, who killed 76 people last week.

"Explosives were found at the farm," police prosecutor Trine Dyngeland told Reuters. "The police carried out a controlled detonation of the explosives."

She said no one was hurt in the controlled blast, at Rena, about 160kms north of Oslo. She declined to estimate what quantities were found. Police believe that Breivik made his bomb using fertiliser as a main ingredient. He bought fertiliser under the cover that he was a farmer.