[What follows is the text of a statement issued by the Scottish Government.]
First Minister Alex Salmond has written to the US Senate Committee on Foreign Relations again today following the Scottish Government's decision to formally decline the invitation for Justice Secretary Kenny MacAskill, and Director of Health and Care of the Scottish Prison Service Dr Andrew Fraser to attend a hearing in person.
The FM, in addition to information already provided, has offered to answer any additional questions in advance of the hearing, and any more that may arise from the hearing itself.
A Scottish Government spokesperson said:
"The First Minister wrote to Senator Kerry on Wednesday providing comprehensive information and assistance, which is the appropriate nature of Scottish Government involvement in the Senate Committee's hearing next week.
"Since the Lockerbie atrocity in 1988, all matters regarding the investigation, prosecution and compassionate release decision have been conducted according to the jurisdiction and laws of Scotland. Clearly, the Senate Committee has responsibility to scrutinise decisions taken within the US system, and Scottish Ministers and public officials are accountable within the Scottish Parliament system. That is the constitutional basis of our democracies.
"The Scottish Parliament's Justice Committee has already undertaken a full inquiry into the decision on compassionate release, and the Westminster Scottish Affairs Committee has also examined the issue in terms of the formal inter-governmental relations that exist within the UK. That is right and proper.
"The focus of the Senators' concern has been any role played by BP in decisions on Al-Megrahi, and we have stated categorically to Senator Kerry that there was no contact of any kind between the Scottish Government and BP.
"In addition to the extensive information already provided, we have written to Senator Kerry again today and offered to answer any additional questions in advance of the hearing, and we would also be very happy to answer formally and in writing any more questions that may arise from the hearing itself.
"In that constructive spirit, we have also given the Committee permission to have the First Minister's initial letter to Senator Kerry, containing substantive information, entered into the hearing's record."
"If any matters emerge concerning the Scottish Government from the UK Cabinet Secretary's upcoming trawl of papers, we would also be happy to respond as necessary.
"We reiterate, however, that the only relevant material held by us and not yet published is information provided by or concerning the US and UK administrations - which we would like to publish in the interests of openness and full disclosure."