Oslo bombing Live Blog

The Norwegian parliament observed a minute’s silence to honour the 77 people killed eleven days ago - the country’s King also took part in the ceremony.

Earlier, Fredrik Hjort Kraby, Norway police prosecutor, gave an update on their investigation.

"It's way too soon to say anything, whether he is insane or sane. And that's for the psychiatrist to decide. And we will just await the investigation."

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 spoke to Runar Kvernen, from the Norwegian National Police Directorate, about the response to the Utoeya Island shooting and whether the police was too slow to react.

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.