Senator Robert Menendez
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US senators demand answers over bomber Megrahi's release

US senators have used the first anniversary of the Lockerbie bomber's release from prison to again call for answers over the circumstances under which he was freed.

Senator Robert Menendez held a news briefing, alongside Senator Frank Lautenberg, in which he said that they were widening the scope of their inquiry into Abdelbasset Ali al-Megrahi's release.

He also called on Libya and Qatar to participate in the investigation and on whistleblowers to come forward if they had any evidence of commercial pressures linked the bomber's release.

Megrahi was freed in 2009 by Scottish ministers, who acted in response to medical advice that he would only live for three months because of cancer.