Norwegian police are analysing security camera footage of the suspect in the car bombing in
Oslo and the shooting on a nearby island that left 76 people dead, the daily Aftenposten reported Thursday, dpa reported.
Anders Behring Breivik has been charged with the bombing in the city that killed eight people, and the subsequent attack Utoya island that killed 68 people on Friday. He was remanded in custody Monday and is to undergo a psychiatric evaluation.
Police were using the footage taken just minutes before the bomb exploded to analyse his movements in Oslo and roads leading in and out of the capital, according to Aftenposten.
Bomb experts say the car bomb near the government headquarters could have caused even greater carnage were it not for an underground passage, that reduced the effect of the bomb. The bomb left a crater estimated to be several metres in diameter and four metres deep.
"This saved many lives and prevented even greater damage to buildings," bomb expert Per Nergaard told the Oslo daily VG.He said he believed Breivik used a fuse that gave him one minute and 15 seconds to leave the scene.
Authorities are also studying the 32-year-old Breivik's computer and his online activity prior to the attacks.
"We are working round the clock to secure this material," said Odd Reinar Humlegard, head of the country's criminal police.
The rental car used in the bombing had led police to Breivik. The Volkswagen Crafter is believed to have been parked in the greater Oslo area on July 20, two days before the bombing, technical journal Teknisk Ukeblad reported.
Another vehicle used by Breivik to reach the island following the bombing, was meanwhile registered as having passed a road toll the next day.