Washington ? The Obama administration has asked the governments of Scotland and Britain to review the decision last summer to release the Libyan convicted in the Lockerbie airliner bombing.

In letters to U.S. lawmakers, Secretary of State Hillary Rodham Clinton said the U.S. was encouraging the Scottish and British authorities to review the circumstances leading to the release of Abdel Baset al-Megrahi. Four senators wrote Clinton last week, questioning whether oil giant BP played a behind-the-scenes role in the decision.

In her response, Clinton wrote that she remained deeply troubled by the Libyan’s release.

“That al-Megrahi is living out his remaining days outside of Scottish custody is an affront to the victims’ families, the memories of those killed in the Lockerbie bombing, and to all of those who worked tirelessly to ensure justice was served,” Clinton wrote.

British Prime Minister David Cameron had not intended to meet with the senators during his visit to the United States. However, the British Embassy in Washington said Monday night that Cameron would meet with them tonight at the British ambassador’s residence.