(CNN) -- A group of U.S. lawmakers have called for an investigation into whether BP may have played a role in lobbying for the release of Abdelbaset al Megrahi to secure an oil contract with the Libyan government.
Megrahi, now 58, was convicted and sentenced to life in prison for the 1988 bombing of Pan Am Flight 103 which killed 270 people, including 189 Americans.
He was released from a Scottish prison on compassionate grounds in August after he was diagnosed with prostate cancer.
