The United States told Scotland it was "far preferable" to free the Lockerbie bomber than have him transferred to a Libyan jail, leaked documents showed today, amid renewed US criticism of the release.

Correspondence obtained by The Sunday Times (of London) newspaper reveals that despite Washington's opposition to Scotland's decision last year to free Libyan Abdelbaset Ali Mohment al-Megrahi, it considered it the most palatable option.

Megrahi was the only person convicted over the 1988 bombing of a US jet over the Scottish town of Lockerbie, which killed 270 people, and his release on compassionate grounds -- he has terminal cancer -- was highly controversial.

The US Senate is re-examining the issue amid claims by US lawmakers that oil giant BP had pressured for Megrahi's release, and anger that he remains alive in Libya despite last August been given just three months to live.

US President Barack Obama's administration has condemned the decision to free Megrahi, but a letter sent by the deputy head of the US embassy in London just days before his release suggests it accepted the move.

The embassy official, Richard LeBaron, wrote to Scottish First Minister Alex Salmond and justice officials on August 12, 2009 -- a week before Megrahi's release -- saying Washington wanted Megrahi to remain in his Scottish jail.

"Nevertheless, if Scottish authorities come to the conclusion that Megrahi must be released from Scottish custody, the US position is that conditional release on compassionate grounds would be a far preferable alternative to prisoner transfer, which we strongly oppose," LeBaron wrote.

Megrahi was eligible for transfer to a Libyan jail under a 2007 agreement between Britain and Libya, which BP had lobbied for in a bid to speed up a huge oil exploration deal it was making with the north African state.

In the event, Scottish Justice Secretary Kenny MacAskill rejected Libya's request for a prison transfer for Megrahi.

LeBaron added that freeing Megrahi but making him live in Scotland "would mitigate a number of the strong concerns we have expressed with regard to Megrahi’s release", according to The Sunday Times.

MacAskill rejected this option on security concerns and finally decided to free Megrahi under the long-standing Scottish policy of compassionate release -- a decision he insists had nothing to do with BP.

Scottish First Minister Salmond confirmed the sentiment expressed in LeBaron's letter, telling Sky News: "I think a fair description of the American government's position is that they didn't want al-Megrahi to be released.

"However, if he was to be released, they thought it was far preferable for compassionate release as opposed to the prisoner transfer agreement."

A key witness in the case was Maltese shopkeeper Tony Gauci - whose evidence led to Mr Megrahi's conviction - amid claims that he was paid in excess of $2 million for his cooperation.

Sign up to our free newsletters

Get the best updates straight to your inbox:
Please select at least one mailing list.

You can unsubscribe at any time by clicking the link in the footer of our emails. We use Mailchimp as our marketing platform. By subscribing, you acknowledge that your information will be transferred to Mailchimp for processing.