The Libyan authorities have appointed prosecutors regarding the Lockerbie bombing.
The Lord Advocate made the announcement in the run-up to the 25th anniversary of the tragedy which claimed 270 lives.
Memorial Services will be held in Lockerbie and Westminster Abbey - and at Arlington Cemetary in America on Saturday.
The Lord Advocate admits the slow progress of the investigation is frustrating but told ITV Border's Peter MacMahon that Scotland's police will pursue the case, with Libyan help.
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Jane Kirkpatrick, 29, knifed Danielle Nicholson in the legs with a knife she picked up inside her home.