Norway's public broadcaster has released video showing convicted mass murderer Anders Breivik setting off a bomb that killed eight people in Oslo in 2011.

The footage from video surveillance cameras shows Breivik parking a white van outside a government building that housed the prime minister's offices.

He is seen getting out of the car in a security guard's uniform and walking away, before a massive explosion.

Breivik  killed 77 people in the bombing and a deadly rampage on the island of Utoeya.

- © Fairfax NZ News