THE Scottish Liberal Democrat leader has written to the Lord Advocate to seek assurances that the Lockerbie bombing is still being "rigorously and actively investigated".

Willie Rennie acted after The Herald revealed last week no Scots police officers have visited Libya as part of the reinvestigation, more than a year after the Gaddafi regime was toppled.

Mr Rennie said the relatives of the victims 1988 atrocity needed assurances that the live investigation was still being supported in its efforts to bring any others involved in the bombing to justice.

He told Frank Mulholland, who had met the interim Libyan prime minister: "In May this year you said 'The investigation into the Lockerbie bombing will continue, to bring to justice the others involved in this act of state-sponsored terrorism.'

"I hope this is still the case and you can provide assurances that the Lockerbie bombing is still being rigorously and actively investigated."

Abdelbaset Ali Mohmed al Megrahi, who died in May, was sentenced to life in prison for the 1988 bombing of a US airliner over the Dumfries and Galloway town, which claimed 270 lives.

The former Libyan intelligence officer was later diagnosed with cancer and released from prison in August 2009.