An Oslo court on Friday sentenced Norwegian far-right extremist Anders Behring Breivik to 21 years in prison, subject to extension, for his killing spree last year that left 77 people dead.

The verdict, in line with what Breivik himself wanted, brings to an end a spectacular 10-week trial for the twin attacks that traumatised normally tranquil Norway and shocked the world.

The unanimous verdict was greeted with a murmur of astonishment in the courtroom. Breivik himself listened to the verdict with a smile.