Norway attacks: Controlled explosion at Breivik's farm
Norwegian police have destroyed a cache of explosives found at a farm leased by Anders Behring Breivik.
It was the second controlled explosion to be carried out on explosives found at the farm.
Police have not revealed the quantities of explosives found.
Anders Behring Breivik, a far-right extremist, admits carrying out the attacks which left at least 76 dead.