Norwegian mass murderer Anders Behring Breivik had planned to assassinate US President Barack Obama with a car bomb when he went to collect his Nobel Peace Prize in Oslo in 2009, the Daily Mail reported.
The terrorist used a similar plan when he attacked the centre of Oslo last July that left 77 people dead.
He exploded a car bomb near government buildings before going on a shooting rampage at a youth camp on nearby Utoya Island.
He told police that he had earlier planned to bomb the Nobel ceremony as a symbolic target with millions watching across the world.
But he scrapped the plan, saying that security would be too tight to get the bomb close enough to Oslo City Hall where the award is presented.
The mass murderer said he took inspiration for the attacks from tactics used by Al Qaeda, the Mail said on Sunday.
Breivik goes on trial on April 16. He has admitted to killing 77 people, but said that it was necessary to alert his countrymen to a war between Islam and the West.