The Scottish Government says that it "never doubted" the safety of the conviction of the Lockerbie bomber following reports that Libyan leader Colonel Gaddafi ordered the attack.
Terminally-ill Abdelbaset al-Megrahi was freed from prison in Scotland and allowed to return to Libya on compassionate grounds in August 2009.
He is the only man to have been convicted of the bombing of Pan Am flight 103 on December 21, 1988, which killed 270 people.
A Swedish newspaper has reported that Col Gaddafi had personally ordered the bombing.
The Expressen said Libya's former justice secretary, Mustafa Abdel-Jalil, told their correspondent in Libya: "I have proof that Gaddafi gave the order about Lockerbie.
"To hide it, he did everything in his power to get Megrahi back from Scotland."
The comments in the paper were translated from Arabic to Swedish.
Mr Abdel-Jalil stepped down as justice minister in protest at the violence against anti-government demonstrators in Libya.
A statement in response from the Scottish Government, which made the decision to release of Megrahi on compassionate grounds, said: "Ministers have never doubted the safety of the conviction."
An official report published earlier this month said the former UK government did "all it could" to help Libya secure Megrahi's release.