Anders Behring Breivik not guilty plea in murder trial

The man who carried out a bomb and gun attack which killed 77 people in Norway last year has pleaded not guilty at the start of his trial in Oslo.

Anders Breivik attacked a summer youth camp organised by the governing Labour party on the island of Utoeya, after setting off a car bomb in the capital.

Breivik has confessed to the killings, but denies criminal responsibility.

Matthew Price reports.