ALEX Salmond has been urged to leave "no stone unturned" in the search for justice for murdered waiter Surjit Singh Chhokar.

Glasgow MSP Humza Yousaf asked Mr Salmond at First Minister's Questions to do "everything in his power" to ensure the case was pursued following recent legislative changes on the double jeopardy law and the jailing of Stephen Lawrence's killers.

Mr Chhokar was killed in Overton, North Lanarkshire, in 1998 and three men were tried for his murder in two separate trials but none was found guilty.

Mr Salmond said the Lord Advocate, Frank Mulholland, has asked Solicitor- General Lesley Thomson to review and prioritise cases which could be prosecuted.

Mr Salmond pointed out that for cases to be brought under the double jeopardy laws there had to be "new and compelling evidence".

In answer to a question from Labour justice spokesman Lewis Macdonald, Mr Salmond offered an assurance that prosecutors had the resources necessary to pursue cold cases.

Mr Yousaf said the jailing of Stephen Lawrence's killers showed the impact new evidence could have in delivering justice.

He said: "To those who committed this heinous crime they should be sleeping uneasy in their bed at night."

Aamer Anwar, a long-time campaigner for justice for the Chhokar family, said they would be highlighting the case on a visit to Holyrood planned for Tuesday.

As The Herald reported earlier this week, the Crown Office has also been urged to re-open the "racist" murder of a Somali student in Edinburgh 23 years ago.