<p><br /> Scotland's First Minister has written to US senators as the row over the release of the Lockerbie bomber continues.<br /> </p><p><br /> In a letter to John Kerry, chairman of the Senate Committee on Foreign Relations, Alex Salmond made clear that the Scottish Government made the decision to free Abdelbaset al-Megrahi on compassionate grounds and had received no representations from BP on the matter.<br /> </p><p><br /> The First Minister said the decision was made with "integrity" and following a "clear legal process".<br /> </p><p><br /> Libyan Megrahi is the only man to have been convicted of the Lockerbie atrocity which killed 270 people in the bombing of Pan Am flight 103 on December 21, 1988.<br /> </p><p><br /> He was released from a Scottish prison last August, having been given three months to live, but is still alive and living with his family in the Libyan capital, Tripoli.<br /> </p><p><br /> David Cameron's first visit to Washington as Prime Minister has been overshadowed by the row over his release, with US senators suspicious that oil giant BP may have had a hand in the affair.<br /> </p>